Friday, March 29, 2013

copy files one folder to create dyanmic new folder using php


<?php
$ran=rand(125,2212);
copyfolder('bk', $ran);
function copyfolder($source, $destination)
{

       //Open the specified directory

       $directory = opendir($source);

       //Create the copy folder location

      if(!file_exists($destination)){
    mkdir($destination);
 }else{
  echo $destination." floder already exits";
  exit;
 }

       //Scan through the folder one file at a time


       while(($file = readdir($directory)) != false)
       {

              //Copy each individual file

              if(copy($source.'/'.$file,$destination.'/'.$file)){

 }

       }
 
 
$file = $destination.'/index.php';
// Open the file to get existing content
$current = file_get_contents($file);


// Append a new person to the file
$current .= "\nMage::run('$destination', 'website');\n";
// Write the contents back to the file
file_put_contents($file, $current);

}

?>

Thursday, March 28, 2013

transaction in mysql using php example

<?php
function begin()
{
mysql_query("BEGIN");
}

function commit()
{
mysql_query("COMMIT");
}

function rollback()
{
mysql_query("ROLLBACK");
}

mysql_connect("localhost","Dude1", "SuperSecret") or die(mysql_error());

mysql_select_db("bedrock") or die(mysql_error());

$query = "INSERT INTO employee (ssn,name,phone) values ('123-45-6789','Matt','1-800-555-1212')";

begin(); // transaction begins

$result = mysql_query($query);

if(!$result)
{
rollback(); // transaction rolls back
echo "transaction rolled back";
exit;
}
else
{
commit(); // transaction is committed
echo "Database transaction was successful";
}

?>

Friday, March 22, 2013

what does ReflectionMethod in php

Invokes the reflected method and pass its arguments as array. 
<?phpclass getclass{

    public function heloname
($name) {
        return 
'Hi' $name;
    }

}
$reflectionMethod = new ReflectionMethod('getclass''heloname
');
echo 
$reflectionMethod->invokeArgs(new
getclass(), array('Mike'));?>

joomla dynamic url rewite iis using web.config

<rewrite>
            <rules>
                <clear />
                <rule name="Imported Rule 1">
                    <match url="(.*)" ignoreCase="false" />
                    <conditions logicalGrouping="MatchAll">
                        <add input="{REQUEST_FILENAME}" matchType="IsFile" ignoreCase="false" negate="true" />
                        <add input="{REQUEST_FILENAME}" matchType="IsDirectory" ignoreCase="false" negate="true" />
                        <add input="{URL}" pattern="^/index.php" ignoreCase="false" negate="true" />
                        <add input="{URL}" pattern="(/|\.php|\.html|\.htm|\.feed|\.pdf|\.raw|/[^.]*)$" />
                    </conditions>
                    <action type="Rewrite" url="index.php" />
                </rule>
            </rules>
        </rewrite>

Thursday, March 21, 2013

easy way to find and replace row value entair mysql table in database using php

<?php// Find and replace facility for complete MySQL database
//
// Written by Mark Jackson @ MJDIGITAL
// Can be used by anyone - but give me a nod if you do!
// http://www.mjdigital.co.uk/blog

// SEARCH FOR
$search        '**__FIND_THIS__**';// REPLACE WITH$replace    '**__REPLACE_WITH_THIS__**';

 // (used if queryType below is set to 'replace')

// DB Details
$hostname "__DB_HOST__";$database "__DB_DATABASE__";$username "__DB_USER__";$password "__DB_PASSWORD__";// Query Type: 'search' or 'replace'$queryType 'replace';// show errors (.ini file dependant) - true/false$showErrors true;//////////////////////////////////////////////////////
//
//        DO NOT EDIT BELOW
//
//////////////////////////////////////////////////////
if($showErrors) {
    
error_reporting(E_ALL);
    
ini_set('error_reporting'E_ALL);
    
ini_set('display_errors',1);
}
// Create connectio to DB$MJCONN mysql_pconnect($hostname$username$password) or 

 trigger_error(mysql_error()
,E_USER_ERROR);mysql_select_db($database,$MJCONN);// Get list of tables$table_sql 'SHOW TABLES';$table_q mysql_query($table_sql,$MJCONN) or die("Cannot Query DB: ".mysql_error());$tables_r mysql_fetch_assoc($table_q);$tables = array();

do{
    
$tables[] = $tables_r['Tables_in_'.strtolower($database)];
}while(
$tables_r mysql_fetch_assoc($table_q));// create array to hold required SQL$use_sql = array();$rowHeading = ($queryType=='replace') ?
        
'Replacing \''.$search.'\' with \''.$replace.'\' in \''.$database."'\n\nSTATUS    |    ROWS AFFECTED    |    TABLE/FIELD    (+ERROR)\n"
      
'Searching for \''.$search.'\' in \''.$database."'\n\nSTATUS    |    ROWS CONTAINING    |    TABLE/FIELD    (+ERROR)\n";$output $rowHeading;$summary '';// LOOP THROUGH EACH TABLEforeach($tables as $table) {
    
// GET A LIST OF FIELDS
    
$field_sql 'SHOW FIELDS FROM '.$table;
    
$field_q mysql_query($field_sql,$MJCONN);
    
$field_r mysql_fetch_assoc($field_q);

    
// compile + run SQL
    
do {
        
$field $field_r['Field'];
        
$type $field_r['Type'];

        switch(
true) {
            
// set which column types can be replaced/searched
            
case stristr(strtolower($type),'char'): $typeOK true; break;
            case 
stristr(strtolower($type),'text'): $typeOK true; break;
            case 
stristr(strtolower($type),'blob'): $typeOK true; break;
            case 
stristr(strtolower($field_r['Key']),'pri'): $typeOK false;

 break; // do not replace on primary keys
            
default: $typeOK false; break;
        }

        if(
$typeOK) { // Field type is OK ro replacement
            // create unique handle for update_sql array
            
$handle $table.'_'.$field;
            if(
$queryType=='replace') {
                
$sql[$handle]['sql'] = 'UPDATE '.$table.' SET '.$field.' = REPLACE('.$field.',\''.$search.'\',\''.$replace.'\')';
            } else {
                
$sql[$handle]['sql'] = 'SELECT * FROM '.$table.' WHERE '.$field.' REGEXP(\''.$search.'\')';
            }

            
// execute SQL
            
$error false;
            
$query = @mysql_query($sql[$handle]['sql'],$MJCONN) or $error mysql_error();
            
$row_count = @mysql_affected_rows() or $row_count 0;

            
// store the output (just in case)
            
$sql[$handle]['result'] = $query;
            
$sql[$handle]['affected'] = $row_count;
            
$sql[$handle]['error'] = $error;

            
// Write out Results into $output
            
$output .= ($query) ? 'OK        ' '--        ';
            
$output .= ($row_count>0) ? '<strong>'.$row_count.'</strong>         

   ' '<span style="color:#CCC">'.$row_count.'</span>            ';
            
$fieldName '`'.$table.'`.`'.$field.'`';
            
$output .= $fieldName;
            
$erTab str_repeat(' ', (60-strlen($fieldName)) );
            
$output .= ($error) ? $erTab.'(ERROR: '.$error.')' '';

            
$output .= "\n";
        }
    }while(
$field_r mysql_fetch_assoc($field_q));
}
// write the output out to the pageecho '<pre>';
echo 
$output."\n";
echo 
'<pre>';?>

Saturday, March 16, 2013

how to find number of parameter declare in function

simple example

function x(a,b,c){
alert(x.lenght) ;
}
you can findout 3
last call your function
x();

Wednesday, March 13, 2013

Introduction to Socket Programming with PHP

Introduction to Socket Programming with PHP

Are you one of those sorry souls who has desperately tried to learn network programming in C, but never had the stamina to tame the wild beast? I was for a long time until I finally decided that I had to learn it -- not only for my own satisfaction, but because I bumped into a problem that required some network programming. After a few sweaty nights, I became completely overwhelmed. Then I realized that my favorite programming language of all time, PHP, included a basic socket implementation. Hallelujah! I was saved!
While PHP's primary goal is to be a high-quality programming language for developing web-based applications, it has many neat features that could convince you to use it for other tasks as well -- for example, network programming.

Understanding sockets

What PHP unfortunately won't do for you is give you a basic understanding of what sockets really are, and how you can use them to create communication between two computers. So we'll have to go through that part ourselves. It's really not that hard, and hopefully this article will make it even easier.
You know what a network is, right? Know what a socket is? Not really? Sockets are just an abstraction of a low-level feature of the operating system. However, we don't need to go that deep to use sockets in our programs. We just need to get a basic understanding of how the socket philosophy works.
To explain this, I'll compare the process to a videogame, a game that resembles the real world quite closely, except that in the game all computer networks are organized by small men. You can control these small men to do exactly what you want, but there is a drawback. These men don't have any intelligence of their own -- they will do exactly as they are told, no matter how wrong that happens to be.
Diagram of the game.
Figure 1: Controlling a network with small men.
I think we need a description of the game -- what are the goals here? To begin with, you need to make one man in "Computer I" go into the network connection and wait for some data to arrive. When the data does arrive, he's ready to open the hatch to let the data in. When this data comes through the hatch, someone has to lead it to the correct destination inside the computer. However, if you let the man in charge of the hatch do that job as well, who would make sure that the hatch is opened if additional data wants to get in?
There's actually a really simple solution to this problem: Just ask another man to lead whatever came in through the hatch to its destination inside the machine. In doing this, you are letting the first man continue to concentrate on his hatch job.
But we're not done yet: You also have to make one of the men in Computer II go to the hatch on his end to make sure the hatch is opened when something wants to get out. I'll play the first game, so you can see how it works. I start out by pushing a few buttons, and move the joystick around and voilĂ  -- we have Figure 2.
Diagram.
Figure 2: Here everything is in place.
But what is this?! Where's the third man? Take it easy, he'll be there. But wouldn't it be a waste of good working power to just let him stand there until something arrives? Wouldn't it be better to let him continue doing whatever it is he's doing and call for him when we actually have something for him to do?
After some more pushing, slamming, and banging around on the controls, I've told Computer II that I need to get some data, and have directed the man in Computer II open the hatch so the data can get out. In Figure 3, the data is on its way.
Diagram.
Figure 3: Data on its way!
As you can see, a chunk of data has now passed through the hatch of Computer II, and is on its way to "Computer I" (and don't wonder how that large chunk came through the tiny hatch!). This is coming along pretty well, just move the controls ... like ... that ... and if I push this ... and ... Ah! There you have it:
Diagram.
Figure 4: Data has arrived!
Here, I have managed to get the data from Computer II, send it through the network connection, and then into Computer I. I also called for a second man in Computer I to take care of the data. As you can see, he's just about to get the data in place. I must say, I'm pretty satisfied with myself.

Saturday, March 9, 2013

how to create easy captch in php and validation server side

stp1-create CaptchaSecurityImages.php

<?php
session_start();

/*
* File: CaptchaSecurityImages.php
* Author: Simon Jarvis
* Copyright: 2006 Simon Jarvis
* Date: 03/08/06
* Updated: 07/02/07
* Requirements: PHP 4/5 with GD and FreeType libraries
* Link: http://www.white-hat-web-design.co.uk/articles/php-captcha.php
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details:
* http://www.gnu.org/licenses/gpl.html
*
*/

class CaptchaSecurityImages {

    var $font = 'monofont.ttf';

    function generateCode($characters) {
        /* list all possible characters, similar looking characters and vowels have been removed */
        $possible = '23456789bcdfghjkmnpqrstvwxyz';
        $code = '';
        $i = 0;
        while ($i < $characters) {
            $code .= substr($possible, mt_rand(0, strlen($possible)-1), 1);
            $i++;
        }
        return $code;
    }

    function CaptchaSecurityImages($width='120',$height='40',$characters='6') {
        $code = $this->generateCode($characters);
        /* font size will be 75% of the image height */
        $font_size = $height * 0.75;
        $image = @imagecreate($width, $height) or die('Cannot initialize new GD image stream');
        /* set the colours */
        $background_color = imagecolorallocate($image, 255, 255, 255);
        $text_color = imagecolorallocate($image, 20, 40, 100);
        $noise_color = imagecolorallocate($image, 100, 120, 180);
        /* generate random dots in background */
        for( $i=0; $i<($width*$height)/3; $i++ ) {
            imagefilledellipse($image, mt_rand(0,$width), mt_rand(0,$height), 1, 1, $noise_color);
        }
        /* generate random lines in background */
        for( $i=0; $i<($width*$height)/150; $i++ ) {
            imageline($image, mt_rand(0,$width), mt_rand(0,$height), mt_rand(0,$width), mt_rand(0,$height), $noise_color);
        }
        /* create textbox and add text */
        $textbox = imagettfbbox($font_size, 0, $this->font, $code) or die('Error in imagettfbbox function');
        $x = ($width - $textbox[4])/2;
        $y = ($height - $textbox[5])/2;
        imagettftext($image, $font_size, 0, $x, $y, $text_color, $this->font , $code) or die('Error in imagettftext function');
        /* output captcha image to browser */
        header('Content-Type: image/jpeg');
        imagejpeg($image);
        imagedestroy($image);
         $_SESSION['security_code'] = $code;
        }

}

$width = isset($_GET['width']) ? $_GET['width'] : '120';
$height = isset($_GET['height']) ? $_GET['height'] : '40';
$characters = isset($_GET['characters']) && $_GET['characters'] > 1 ? $_GET['characters'] : '6';

$captcha = new CaptchaSecurityImages($width,$height,$characters);

?>

-------------------------------------------------
stp2-
    <img src="CaptchaSecurityImages.php?width=162&height=45&characters=5" />

    <input type="text" name="captcha" value="" class="txtinput" />

stp3-for validate in php

 $securetycheck = $_POST['captcha'];
if(empty($securetycheck))
    {
        $err_msg = "Please Enter Security Code";
    }

    else if($_POST['captcha']!=$_SESSION['security_code']){
       // echo "====".$_SESSION['security_code']."==".$_POST['captcha'];
        $err_msg = "Please Enter Proper Security Code";

    }

Thursday, March 7, 2013

Validating Telephone Numbers with PHP custom function

Validating Telephone Numbers with PHP (Server Side)

Here is the function that I came up with for validating telephone numbers with PHP:
function validatePhone($string) {
    $numbersOnly = ereg_replace("[^0-9]", "", $string);
    $numberOfDigits = strlen($numbersOnly);
    if ($numberOfDigits == 7 or $numberOfDigits == 10) {
        echo $numbersOnly;
    } else {
        echo 'Invalid Phone Number';
    }
}

Wednesday, March 6, 2013

group by and order by difference in mysql

OREDER BY sort your result set into asc or desc order, asc in the default.
whereas The GROUP BY keyword is used when we are selecting multiple columns from a table (or tables) and at least one arithmetic operator appears in the SELECT statement. When that happens, we need to GROUP BY all the other selected columns, i.e., all columns except the one(s) operated on by the arithmetic operator
down vote accepted
ORDER BY alters the order in which items are returned.
GROUP BY will aggregate records by the specified columns which allows you to perform aggregation functions on non-grouped columns (such as SUM, COUNT, AVG, etc).
.

Tuesday, March 5, 2013

use why __autoload function in php with example

A simple example of using PHP's __autoload function is like so:
function __autoload($classname) {
    include("classes/$classname.class.php");   
}
If you then ran the following code
$testclass= new testclass;
and the "testclass" class had not yet been defined, __autoload is called passing "
testclass
" as the parameter. The example __autoload function then includes the appropriate file which as defined in the above example would be "classes/
testclass.class.php", although you would change this to 
whatever your naming convention and location of class files is.
Note that there's no need to use include_once() or require_once() to include the files - just include() or require() will do. This is because __autoload won't need to be called again if you create another instance of the class because the class is already defined. The following illustrates this:
echo "new testclass<br />";
$testclass= new testclass;
echo "new testclass<br />";
$testclass= new testclass;
echo "new bar<br />";
$bar = new bar;

function __autoload($classname) {
    echo "autoload $classname<br />";
    include("classes/$classname.class.php");
}
The output from the above would be:
new testclass
autoload testclass
new testclass
new bar
autoload testclass
This shows that __autoload() was only called each time a class that wasn't already defined was used. Because the "foo" class had aready been defined the second time we create a
testclass
object the class was already defined and did not need to be loaded again.
Using the autoload function in PHP is really useful because you don't need to bother including all the necessary class files at the start of each script: they will be automatically loaded as and when required.

Monday, March 4, 2013

Difference between foo() and @foo() in php?

@foo() suppresses errors. If foo() triggers an error, warning or a notice, it won't get displayed/logged even if error_reporting is set to display/log them. (Note that errors still cause PHP to stop executing - it just won't display/log anything).

In general, you should NOT be using this kind of error suppression unless you're checking for errors another way - it's not a good idea to keep anyone from knowing about errors that come up. Furthermore, if your code is ALWAYS returning some kind of non-fatal error, you need to fix that, not hide it - also, what happens if an error you DIDN'T expect come up?

If foo() returns FALSE and raises a warning on failure (for example), you could do something like this: (bar() is called only if foo() fails and returns false)

 So simply using a @ sign before a function call will not output errors related to that function

foo() executes the function and any parse/syntax/thrown errors will be displayed on the page.

@foo() will mask any parse/syntax/thrown errors as it executes.
You will commonly find most applications use @mysql_connect() to hide mysql errors or @mysql_query. However, I feel that approach is significantly flawed as you should never hide errors, rather you should manage them accordingly and if you can, fix them.
<code>
@foo() or bar();
</code>

or

<code>
if ( @foo() === FALSE ) {
// foo() failed! do something here
}
</code>

What is difference between array_merge and array_combine? in php

What is array_merge and array_combine?

array_merge — Merge one or more arrays
Merges the elements of one or more arrays together so that the values of one are appended to the end of the previous one. It returns the resulting array.
If the input arrays have the same string keys, then the later value for that key will overwrite the previous one. If, however, the arrays contain numeric keys, the later value will not overwrite the original value, but will be appended.
If only one array is given and the array is numerically indexed, the keys get reindexed in a continuous way.
$array1 = array("color" => "red", 2, 4);
$array2 = array("a", "b", "color" => "green", "shape" => "trapezoid", 4);
$result = array_merge($array1, $array2);
print_r($result);
?>
Array
(
    [color] => green
    [0] => 2
    [1] => 4
    [2] => a
    [3] => b
    [shape] => trapezoid
    [4] => 4
)
array_combine — Creates an array by using one array for keys and another for its values

easly create thumb image using php,gif,jpeg,png

<?php
/**
 * TimThumb by Ben Gillbanks and Mark Maunder
 * Based on work done by Tim McDaniels and Darren Hoyt
 * http://code.google.com/p/timthumb/
 *
 * GNU General Public License, version 2
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 *
 * Examples and documentation available on the project homepage
 * http://www.binarymoon.co.uk/projects/timthumb/
 *
 * $Rev$
 */

/*
 * --- TimThumb CONFIGURATION ---
 * To edit the configs it is best to create a file called timthumb-config.php
 * and define variables you want to customize in there. It will automatically be
 * loaded by timthumb. This will save you having to re-edit these variables
 * everytime you download a new version
*/
define ('VERSION', '2.8.10');                                                                        // Version of this script
//Load a config file if it exists. Otherwise, use the values below
if( file_exists(dirname(__FILE__) . '/timthumb-config.php'))    require_once('timthumb-config.php');
if(! defined('DEBUG_ON') )                    define ('DEBUG_ON', false);                                // Enable debug logging to web server error log (STDERR)
if(! defined('DEBUG_LEVEL') )                define ('DEBUG_LEVEL', 1);                                // Debug level 1 is less noisy and 3 is the most noisy
if(! defined('MEMORY_LIMIT') )                define ('MEMORY_LIMIT', '30M');                            // Set PHP memory limit
if(! defined('BLOCK_EXTERNAL_LEECHERS') )     define ('BLOCK_EXTERNAL_LEECHERS', false);                // If the image or webshot is being loaded on an external site, display a red "No Hotlinking" gif.

//Image fetching and caching
if(! defined('ALLOW_EXTERNAL') )            define ('ALLOW_EXTERNAL', TRUE);                        // Allow image fetching from external websites. Will check against ALLOWED_SITES if ALLOW_ALL_EXTERNAL_SITES is false
if(! defined('ALLOW_ALL_EXTERNAL_SITES') )     define ('ALLOW_ALL_EXTERNAL_SITES', TRUE);                // Less secure.
if(! defined('FILE_CACHE_ENABLED') )         define ('FILE_CACHE_ENABLED', TRUE);                    // Should we store resized/modified images on disk to speed things up?
if(! defined('FILE_CACHE_TIME_BETWEEN_CLEANS'))    define ('FILE_CACHE_TIME_BETWEEN_CLEANS', 86400);    // How often the cache is cleaned

if(! defined('FILE_CACHE_MAX_FILE_AGE') )     define ('FILE_CACHE_MAX_FILE_AGE', 86400);                // How old does a file have to be to be deleted from the cache
if(! defined('FILE_CACHE_SUFFIX') )         define ('FILE_CACHE_SUFFIX', '.timthumb.txt');            // What to put at the end of all files in the cache directory so we can identify them
if(! defined('FILE_CACHE_PREFIX') )         define ('FILE_CACHE_PREFIX', 'timthumb');                // What to put at the beg of all files in the cache directory so we can identify them
if(! defined('FILE_CACHE_DIRECTORY') )         define ('FILE_CACHE_DIRECTORY', './cache');                // Directory where images are cached. Left blank it will use the system temporary directory (which is better for security)
if(! defined('MAX_FILE_SIZE') )                define ('MAX_FILE_SIZE', 10485760);                        // 10 Megs is 10485760. This is the max internal or external file size that we'll process. 
if(! defined('CURL_TIMEOUT') )                define ('CURL_TIMEOUT', 20);                      
     // Timeout duration for Curl. This only applies if you have Curl installed and aren't using PHP's default URL fetching mechanism.
if(! defined('WAIT_BETWEEN_FETCH_ERRORS') )    define ('WAIT_BETWEEN_FETCH_ERRORS', 3600);                //Time to wait between errors fetching remote file

//Browser caching
if(! defined('BROWSER_CACHE_MAX_AGE') )     define ('BROWSER_CACHE_MAX_AGE', 864000);                // Time to cache in the browser
if(! defined('BROWSER_CACHE_DISABLE') )     define ('BROWSER_CACHE_DISABLE', false);                // Use for testing if you want to disable all browser caching

//Image size and defaults
if(! defined('MAX_WIDTH') )             define ('MAX_WIDTH', 1500);                                    // Maximum image width
if(! defined('MAX_HEIGHT') )             define ('MAX_HEIGHT', 1500);                                // Maximum image height
if(! defined('NOT_FOUND_IMAGE') )        define ('NOT_FOUND_IMAGE', '');                                // Image to serve if any 404 occurs
if(! defined('ERROR_IMAGE') )            define ('ERROR_IMAGE', '');                                    // Image to serve if an error occurs instead of showing error message
if(! defined('PNG_IS_TRANSPARENT') )     define ('PNG_IS_TRANSPARENT', FALSE);  //42 Define if a png image should have a transparent background color. Use False value if you want to display a custom coloured canvas_colour
if(! defined('DEFAULT_Q') )                define ('DEFAULT_Q', 90);                                    // Default image quality. Allows overrid in timthumb-config.php
if(! defined('DEFAULT_ZC') )            define ('DEFAULT_ZC', 1);                                    // Default zoom/crop setting. Allows overrid in timthumb-config.php
if(! defined('DEFAULT_F') )                define ('DEFAULT_F', '');                                    // Default image filters. Allows overrid in timthumb-config.php
if(! defined('DEFAULT_S') )                define ('DEFAULT_S', 0);                                    // Default sharpen value. Allows overrid in timthumb-config.php
if(! defined('DEFAULT_CC') )            define ('DEFAULT_CC', 'ffffff');                            // Default canvas colour. Allows overrid in timthumb-config.php


//Image compression is enabled if either of these point to valid paths

//These are now disabled by default because the file sizes of PNGs (and GIFs) are much smaller than we used to generate.
//They only work for PNGs. GIFs and JPEGs are not affected.
if(! defined('OPTIPNG_ENABLED') )         define ('OPTIPNG_ENABLED', false); 
if(! defined('OPTIPNG_PATH') )             define ('OPTIPNG_PATH', '/usr/bin/optipng'); //This will run first because it gives better compression than pngcrush.
if(! defined('PNGCRUSH_ENABLED') )         define ('PNGCRUSH_ENABLED', false);
if(! defined('PNGCRUSH_PATH') )         define ('PNGCRUSH_PATH', '/usr/bin/pngcrush'); //This will only run if OPTIPNG_PATH is not set or is not valid

/*
    -------====Website Screenshots configuration - BETA====-------
   
    If you just want image thumbnails and don't want website screenshots, you can safely leave this as is.   
   
    If you would like to get website screenshots set up, you will need root access to your own server.

    Enable ALLOW_ALL_EXTERNAL_SITES so you can fetch any external web page. This is more secure now that we're using a non-web folder for cache.
    Enable BLOCK_EXTERNAL_LEECHERS so that your site doesn't generate thumbnails for the whole Internet.

    Instructions to get website screenshots enabled on Ubuntu Linux:

    1. Install Xvfb with the following command: sudo apt-get install subversion libqt4-webkit libqt4-dev g++ xvfb
    2. Go to a directory where you can download some code
    3. Check-out the latest version of CutyCapt with the following command: svn co https://cutycapt.svn.sourceforge.net/svnroot/cutycapt
    4. Compile CutyCapt by doing: cd cutycapt/CutyCapt
    5. qmake
    6. make
    7. cp CutyCapt /usr/local/bin/
    8. Test it by running: xvfb-run --server-args="-screen 0, 1024x768x24" CutyCapt --url="http://markmaunder.com/" --out=test.png
    9. If you get a file called test.png with something in it, it probably worked. Now test the script by accessing it as follows:
    10. http://yoursite.com/path/to/timthumb.php?src=http://markmaunder.com/&webshot=1

    Notes on performance:
    The first time a webshot loads, it will take a few seconds.
    From then on it uses the regular timthumb caching mechanism with the configurable options above
    and loading will be very fast.

    --ADVANCED USERS ONLY--
    If you'd like a slight speedup (about 25%) and you know Linux, you can run the following command which will keep Xvfb running in the background.
    nohup Xvfb :100 -ac -nolisten tcp -screen 0, 1024x768x24 > /dev/null 2>&1 &
    Then set WEBSHOT_XVFB_RUNNING = true below. This will save your server having to fire off a new Xvfb server and shut it down every time a new shot is generated.
    You will need to take responsibility for keeping Xvfb running in case it crashes. (It seems pretty stable)
    You will also need to take responsibility for server security if you're running Xvfb as root.


*/
if(! defined('WEBSHOT_ENABLED') )     define ('WEBSHOT_ENABLED', false);            //Beta feature. Adding webshot=1 to your query string will cause the script to return a browser screenshot rather than try to fetch an image.
if(! defined('WEBSHOT_CUTYCAPT') )     define ('WEBSHOT_CUTYCAPT', '/usr/local/bin/CutyCapt'); //The path to CutyCapt.
if(! defined('WEBSHOT_XVFB') )         define ('WEBSHOT_XVFB', '/usr/bin/xvfb-run');        //The path to the Xvfb server
if(! defined('WEBSHOT_SCREEN_X') )     define ('WEBSHOT_SCREEN_X', '1024');            //1024 works ok
if(! defined('WEBSHOT_SCREEN_Y') )     define ('WEBSHOT_SCREEN_Y', '768');            //768 works ok
if(! defined('WEBSHOT_COLOR_DEPTH') )     define ('WEBSHOT_COLOR_DEPTH', '24');            //I haven't tested anything besides 24
if(! defined('WEBSHOT_IMAGE_FORMAT') )     define ('WEBSHOT_IMAGE_FORMAT', 'png');            //png is about 2.5 times the size of jpg but is a LOT better quality
if(! defined('WEBSHOT_TIMEOUT') )     define ('WEBSHOT_TIMEOUT', '20');            //Seconds to wait for a webshot
if(! defined('WEBSHOT_USER_AGENT') )     define ('WEBSHOT_USER_AGENT', "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.9.2.18) Gecko/20110614 Firefox/3.6.18"); //I hate to do this, but a non-browser robot user agent might not show what humans see. So we pretend to be Firefox
if(! defined('WEBSHOT_JAVASCRIPT_ON') ) define ('WEBSHOT_JAVASCRIPT_ON', true);            //Setting to false might give you a slight speedup and block ads. But it could cause other issues.
if(! defined('WEBSHOT_JAVA_ON') )     define ('WEBSHOT_JAVA_ON', false);            //Have only tested this as fase
if(! defined('WEBSHOT_PLUGINS_ON') )     define ('WEBSHOT_PLUGINS_ON', true);            //Enable flash and other plugins
if(! defined('WEBSHOT_PROXY') )     define ('WEBSHOT_PROXY', '');                //In case you're behind a proxy server.
if(! defined('WEBSHOT_XVFB_RUNNING') )    define ('WEBSHOT_XVFB_RUNNING', false);            //ADVANCED: Enable this if you've got Xvfb running in the background.


// If ALLOW_EXTERNAL is true and ALLOW_ALL_EXTERNAL_SITES is false, then external images will only be fetched from these domains and their subdomains.
if(! isset($ALLOWED_SITES)){
    $ALLOWED_SITES = array (
        'flickr.com',
        'staticflickr.com',
        'picasa.com',
        'img.youtube.com',
        'upload.wikimedia.org',
        'photobucket.com',
        'imgur.com',
        'imageshack.us',
        'tinypic.com',
    );
}
// -------------------------------------------------------------
// -------------- STOP EDITING CONFIGURATION HERE --------------
// -------------------------------------------------------------

timthumb::start();

class timthumb {
    protected $src = "";
    protected $is404 = false;
    protected $docRoot = "";
    protected $lastURLError = false;
    protected $localImage = "";
    protected $localImageMTime = 0;
    protected $url = false;
    protected $myHost = "";
    protected $isURL = false;
    protected $cachefile = '';
    protected $errors = array();
    protected $toDeletes = array();
    protected $cacheDirectory = '';
    protected $startTime = 0;
    protected $lastBenchTime = 0;
    protected $cropTop = false;
    protected $salt = "";
    protected $fileCacheVersion = 1; //Generally if timthumb.php is modifed (upgraded) then the salt changes and all cache files are recreated. This is a backup mechanism to force regen.
    protected $filePrependSecurityBlock = "<?php die('Execution denied!'); //"; //Designed to have three letter mime type, space, question mark and greater than symbol appended. 6 bytes total.
    protected static $curlDataWritten = 0;
    protected static $curlFH = false;
    public static function start(){
        $tim = new timthumb();
        $tim->handleErrors();
        $tim->securityChecks();
        if($tim->tryBrowserCache()){
            exit(0);
        }
        $tim->handleErrors();
        if(FILE_CACHE_ENABLED && $tim->tryServerCache()){
            exit(0);
        }
        $tim->handleErrors();
        $tim->run();
        $tim->handleErrors();
        exit(0);
    }
    public function __construct(){
        global $ALLOWED_SITES;
        $this->startTime = microtime(true);
        date_default_timezone_set('UTC');
        $this->debug(1, "Starting new request from " . $this->getIP() . " to " . $_SERVER['REQUEST_URI']);
        $this->calcDocRoot();
        //On windows systems I'm assuming fileinode returns an empty string or a number that doesn't change. Check this.
        $this->salt = @filemtime(__FILE__) . '-' . @fileinode(__FILE__);
        $this->debug(3, "Salt is: " . $this->salt);
        if(FILE_CACHE_DIRECTORY){
            if(! is_dir(FILE_CACHE_DIRECTORY)){
                @mkdir(FILE_CACHE_DIRECTORY);
                if(! is_dir(FILE_CACHE_DIRECTORY)){
                    $this->error("Could not create the file cache directory.");
                    return false;
                }
            }
            $this->cacheDirectory = FILE_CACHE_DIRECTORY;
            if (!touch($this->cacheDirectory . '/index.html')) {
                $this->error("Could not create the index.html file - to fix this create an empty file named index.html file in the cache directory.");
            }
        } else {
            $this->cacheDirectory = sys_get_temp_dir();
        }
        //Clean the cache before we do anything because we don't want the first visitor after FILE_CACHE_TIME_BETWEEN_CLEANS expires to get a stale image.
        $this->cleanCache();
       
        $this->myHost = preg_replace('/^www\./i', '', $_SERVER['HTTP_HOST']);
        $this->src = $this->param('src');
        $this->url = parse_url($this->src);
//        $this->src = preg_replace('/https?:\/\/(?:www\.)?' . $this->myHost . '/i', '', $this->src);
       
        if(strlen($this->src) <= 3){
            $this->error("No image specified");
            return false;
        }
        if(BLOCK_EXTERNAL_LEECHERS && array_key_exists('HTTP_REFERER', $_SERVER) && (! preg_match('/^https?:\/\/(?:www\.)?' . $this->myHost . '(?:$|\/)/i', $_SERVER['HTTP_REFERER']))){
            // base64 encoded red image that says 'no hotlinkers'
            // nothing to worry about! :)
            $imgData = base64_decode("R0lGODlhUAAMAIAAAP8AAP///yH5BAAHAP8ALAAAAABQAAwAAAJpjI+py+0Po
5y0OgAMjjv01YUZ\nOGplhWXfNa6JCLnWkXplrcBmW+spbwvaVr/cDyg7IoFC2KbYVC2NQ5MQ4ZNao9Ynzjl9ScNYpneb\nDULB3RP6JuPuaGfuuV4fumf8PuvqFyhYtjdoeFgAADs=");
            header('Content-Type: image/gif');
            header('Content-Length: ' . sizeof($imgData));
            header('Cache-Control: no-store, no-cache, must-revalidate, max-age=0');
            header("Pragma: no-cache");
            header('Expires: ' . gmdate ('D, d M Y H:i:s', time()));
            echo $imgData;
            return false;
            exit(0);
        }
        if(preg_match('/^https?:\/\/[^\/]+/i', $this->src)){
            $this->debug(2, "Is a request for an external URL: " . $this->src);
            $this->isURL = true;
        } else {
            $this->debug(2, "Is a request for an internal file: " . $this->src);
        }
        if($this->isURL && (! ALLOW_EXTERNAL)){
            $this->error("You are not allowed to fetch images from an external website.");
            return false;
        }
        if($this->isURL){
            if(ALLOW_ALL_EXTERNAL_SITES){
                $this->debug(2, "Fetching from all external sites is enabled.");
            } else {
                $this->debug(2, "Fetching only from selected external sites is enabled.");
                $allowed = false;
                foreach($ALLOWED_SITES as $site){
                    if ((strtolower(substr($this->url['host'],-strlen($site)-1)) === strtolower(".$site")) || (strtolower($this->url['host'])===strtolower($site))) {
                        $this->debug(3, "URL hostname {$this->url['host']} matches $site so allowing.");
                        $allowed = true;
                    }
                }
                if(! $allowed){
                    return $this->error("You may not fetch images from that site. To enable this site in timthumb, you can either add it to \$ALLOWED_SITES and set ALLOW_EXTERNAL=true. Or you can set ALLOW_ALL_EXTERNAL_SITES=true, depending on your security needs.");
                }
            }
        }

        $cachePrefix = ($this->isURL ? '_ext_' : '_int_');
        if($this->isURL){
            $arr = explode('&', $_SERVER ['QUERY_STRING']);
            asort($arr);
            $this->cachefile = $this->cacheDirectory . '/' . FILE_CACHE_PREFIX . $cachePrefix . md5($this->salt . implode('', $arr) . $this->fileCacheVersion) . FILE_CACHE_SUFFIX;
        } else {
            $this->localImage = $this->getLocalImagePath($this->src);
            if(! $this->localImage){
                $this->debug(1, "Could not find the local image: {$this->localImage}");
                $this->error("Could not find the internal image you specified.");
                $this->set404();
                return false;
            }
            $this->debug(1, "Local image path is {$this->localImage}");
            $this->localImageMTime = @filemtime($this->localImage);
            //We include the mtime of the local file in case in changes on disk.
            $this->cachefile = $this->cacheDirectory . '/' . FILE_CACHE_PREFIX . $cachePrefix . md5($this->salt . $this->localImageMTime . $_SERVER ['QUERY_STRING'] . $this->fileCacheVersion) . FILE_CACHE_SUFFIX;
        }
        $this->debug(2, "Cache file is: " . $this->cachefile);

        return true;
    }
    public function __destruct(){
        foreach($this->toDeletes as $del){
            $this->debug(2, "Deleting temp file $del");
            @unlink($del);
        }
    }
    public function run(){
        if($this->isURL){
            if(! ALLOW_EXTERNAL){
                $this->debug(1, "Got a request for an external image but ALLOW_EXTERNAL is disabled so returning error msg.");
                $this->error("You are not allowed to fetch images from an external website.");
                return false;
            }
            $this->debug(3, "Got request for external image. Starting serveExternalImage.");
            if($this->param('webshot')){
                if(WEBSHOT_ENABLED){
                    $this->debug(3, "webshot param is set, so we're going to take a webshot.");
                    $this->serveWebshot();
                } else {
                    $this->error("You added the webshot parameter but webshots are disabled on this server. You need to set WEBSHOT_ENABLED == true to enable webshots.");
                }
            } else {
                $this->debug(3, "webshot is NOT set so we're going to try to fetch a regular image.");
                $this->serveExternalImage();

            }
        } else {
            $this->debug(3, "Got request for internal image. Starting serveInternalImage()");
            $this->serveInternalImage();
        }
        return true;
    }
    protected function handleErrors(){
        if($this->haveErrors()){
            if(NOT_FOUND_IMAGE && $this->is404()){
                if($this->serveImg(NOT_FOUND_IMAGE)){
                    exit(0);
                } else {
                    $this->error("Additionally, the 404 image that is configured could not be found or there was an error serving it.");
                }
            }
            if(ERROR_IMAGE){
                if($this->serveImg(ERROR_IMAGE)){
                    exit(0);
                } else {
                    $this->error("Additionally, the error image that is configured could not be found or there was an error serving it.");
                }
            }
            $this->serveErrors();
            exit(0);
        }
        return false;
    }
    protected function tryBrowserCache(){
        if(BROWSER_CACHE_DISABLE){ $this->debug(3, "Browser caching is disabled"); return false; }
        if(!empty($_SERVER['HTTP_IF_MODIFIED_SINCE']) ){
            $this->debug(3, "Got a conditional get");
            $mtime = false;
            //We've already checked if the real file exists in the constructor
            if(! is_file($this->cachefile)){
                //If we don't have something cached, regenerate the cached image.
                return false;
            }
            if($this->localImageMTime){
                $mtime = $this->localImageMTime;
                $this->debug(3, "Local real file's modification time is $mtime");
            } else if(is_file($this->cachefile)){ //If it's not a local request then use the mtime of the cached file to determine the 304
                $mtime = @filemtime($this->cachefile);
                $this->debug(3, "Cached file's modification time is $mtime");
            }
            if(! $mtime){ return false; }

            $iftime = strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']);
            $this->debug(3, "The conditional get's if-modified-since unixtime is $iftime");
            if($iftime < 1){
                $this->debug(3, "Got an invalid conditional get modified since time. Returning false.");
                return false;
            }
            if($iftime < $mtime){ //Real file or cache file has been modified since last request, so force refetch.
                $this->debug(3, "File has been modified since last fetch.");
                return false;
            } else { //Otherwise serve a 304
                $this->debug(3, "File has not been modified since last get, so serving a 304.");
                header ($_SERVER['SERVER_PROTOCOL'] . ' 304 Not Modified');
                $this->debug(1, "Returning 304 not modified");
                return true;
            }
        }
        return false;
    }
    protected function tryServerCache(){
        $this->debug(3, "Trying server cache");
        if(file_exists($this->cachefile)){
            $this->debug(3, "Cachefile {$this->cachefile} exists");
            if($this->isURL){
                $this->debug(3, "This is an external request, so checking if the cachefile is empty which means the request failed previously.");
                if(filesize($this->cachefile) < 1){
                    $this->debug(3, "Found an empty cachefile indicating a failed earlier request. Checking how old it is.");
                    //Fetching error occured previously
                    if(time() - @filemtime($this->cachefile) > WAIT_BETWEEN_FETCH_ERRORS){
                        $this->debug(3, "File is older than " . WAIT_BETWEEN_FETCH_ERRORS . " seconds. Deleting and returning false so app can try and load file.");
                        @unlink($this->cachefile);
                        return false; //to indicate we didn't serve from cache and app should try and load
                    } else {
                        $this->debug(3, "Empty cachefile is still fresh so returning message saying we had an error fetching this image from remote host.");
                        $this->set404();
                        $this->error("An error occured fetching image.");
                        return false;
                    }
                }
            } else {
                $this->debug(3, "Trying to serve cachefile {$this->cachefile}");
            }
            if($this->serveCacheFile()){
                $this->debug(3, "Succesfully served cachefile {$this->cachefile}");
                return true;
            } else {
                $this->debug(3, "Failed to serve cachefile {$this->cachefile} - Deleting it from cache.");
                //Image serving failed. We can't retry at this point, but lets remove it from cache so the next request recreates it
                @unlink($this->cachefile);
                return true;
            }
        }
    }
    protected function error($err){
        $this->debug(3, "Adding error message: $err");
        $this->errors[] = $err;
        return false;

    }
    protected function haveErrors(){
        if(sizeof($this->errors) > 0){
            return true;
        }
        return false;
    }
    protected function serveErrors(){
        header ($_SERVER['SERVER_PROTOCOL'] . ' 400 Bad Request');
        $html = '<ul>';
        foreach($this->errors as $err){
            $html .= '<li>' . htmlentities($err) . '</li>';
        }
        $html .= '</ul>';
        echo '<h1>A TimThumb error has occured</h1>The following error(s) occured:<br />' . $html . '<br />';
        echo '<br />Query String : ' . htmlentities ($_SERVER['QUERY_STRING']);
        echo '<br />TimThumb version : ' . VERSION . '</pre>';
    }
    protected function serveInternalImage(){
        $this->debug(3, "Local image path is $this->localImage");
        if(! $this->localImage){
            $this->sanityFail("localImage not set after verifying it earlier in the code.");
            return false;
        }
        $fileSize = filesize($this->localImage);
        if($fileSize > MAX_FILE_SIZE){
            $this->error("The file you specified is greater than the maximum allowed file size.");
            return false;
        }
        if($fileSize <= 0){
            $this->error("The file you specified is <= 0 bytes.");
            return false;
        }
        $this->debug(3, "Calling processImageAndWriteToCache() for local image.");
        if($this->processImageAndWriteToCache($this->localImage)){
            $this->serveCacheFile();
            return true;
        } else {
            return false;
        }
    }
    protected function cleanCache(){
        if (FILE_CACHE_TIME_BETWEEN_CLEANS < 0) {
            return;
        }
        $this->debug(3, "cleanCache() called");
        $lastCleanFile = $this->cacheDirectory . '/timthumb_cacheLastCleanTime.touch';
       
        //If this is a new timthumb installation we need to create the file
        if(! is_file($lastCleanFile)){
            $this->debug(1, "File tracking last clean doesn't exist. Creating $lastCleanFile");
            if (!touch($lastCleanFile)) {
                $this->error("Could not create cache clean timestamp file.");
            }
            return;
        }
        if(@filemtime($lastCleanFile) < (time() - FILE_CACHE_TIME_BETWEEN_CLEANS) ){ //Cache was last cleaned more than 1 day ago
            $this->debug(1, "Cache was last cleaned more than " . FILE_CACHE_TIME_BETWEEN_CLEANS . " seconds ago. Cleaning now.");
            // Very slight race condition here, but worst case we'll have 2 or 3 servers cleaning the cache simultaneously once a day.
            if (!touch($lastCleanFile)) {
                $this->error("Could not create cache clean timestamp file.");
            }
            $files = glob($this->cacheDirectory . '/*' . FILE_CACHE_SUFFIX);
            if ($files) {
                $timeAgo = time() - FILE_CACHE_MAX_FILE_AGE;
                foreach($files as $file){
                    if(@filemtime($file) < $timeAgo){
                        $this->debug(3, "Deleting cache file $file older than max age: " . FILE_CACHE_MAX_FILE_AGE . " seconds");
                        @unlink($file);
                    }
                }
            }
            return true;
        } else {
            $this->debug(3, "Cache was cleaned less than " . FILE_CACHE_TIME_BETWEEN_CLEANS . " seconds ago so no cleaning needed.");
        }
        return false;
    }
    protected function processImageAndWriteToCache($localImage){
        $sData = getimagesize($localImage);
        $origType = $sData[2];
        $mimeType = $sData['mime'];

        $this->debug(3, "Mime type of image is $mimeType");
        if(! preg_match('/^image\/(?:gif|jpg|jpeg|png)$/i', $mimeType)){
            return $this->error("The image being resized is not a valid gif, jpg or png.");
        }

        if (!function_exists ('imagecreatetruecolor')) {
            return $this->error('GD Library Error: imagecreatetruecolor does not exist - please contact your webhost and ask them to install the GD library');
        }

        if (function_exists ('imagefilter') && defined ('IMG_FILTER_NEGATE')) {
            $imageFilters = array (
                1 => array (IMG_FILTER_NEGATE, 0),
                2 => array (IMG_FILTER_GRAYSCALE, 0),
                3 => array (IMG_FILTER_BRIGHTNESS, 1),
                4 => array (IMG_FILTER_CONTRAST, 1),
                5 => array (IMG_FILTER_COLORIZE, 4),
                6 => array (IMG_FILTER_EDGEDETECT, 0),
                7 => array (IMG_FILTER_EMBOSS, 0),
                8 => array (IMG_FILTER_GAUSSIAN_BLUR, 0),
                9 => array (IMG_FILTER_SELECTIVE_BLUR, 0),
                10 => array (IMG_FILTER_MEAN_REMOVAL, 0),
                11 => array (IMG_FILTER_SMOOTH, 0),
            );
        }

        // get standard input properties       
        $new_width =  (int) abs ($this->param('w', 0));
        $new_height = (int) abs ($this->param('h', 0));
        $zoom_crop = (int) $this->param('zc', DEFAULT_ZC);
        $quality = (int) abs ($this->param('q', DEFAULT_Q));
        $align = $this->cropTop ? 't' : $this->param('a', 'c');
        $filters = $this->param('f', DEFAULT_F);
        $sharpen = (bool) $this->param('s', DEFAULT_S);
        $canvas_color = $this->param('cc', DEFAULT_CC);
        $canvas_trans = (bool) $this->param('ct', '1');

        // set default width and height if neither are set already
        if ($new_width == 0 && $new_height == 0) {
            $new_width = 100;
            $new_height = 100;
        }

        // ensure size limits can not be abused
        $new_width = min ($new_width, MAX_WIDTH);
        $new_height = min ($new_height, MAX_HEIGHT);

        // set memory limit to be able to have enough space to resize larger images
        $this->setMemoryLimit();

        // open the existing image
        $image = $this->openImage ($mimeType, $localImage);
        if ($image === false) {
            return $this->error('Unable to open image.');
        }

        // Get original width and height
        $width = imagesx ($image);
        $height = imagesy ($image);
        $origin_x = 0;
        $origin_y = 0;

        // generate new w/h if not provided
        if ($new_width && !$new_height) {
            $new_height = floor ($height * ($new_width / $width));
        } else if ($new_height && !$new_width) {
            $new_width = floor ($width * ($new_height / $height));
        }

        // scale down and add borders
        if ($zoom_crop == 3) {

            $final_height = $height * ($new_width / $width);

            if ($final_height > $new_height) {
                $new_width = $width * ($new_height / $height);
            } else {
                $new_height = $final_height;
            }

        }

        // create a new true color image
        $canvas = imagecreatetruecolor ($new_width, $new_height);
        imagealphablending ($canvas, false);

        if (strlen($canvas_color) == 3) { //if is 3-char notation, edit string into 6-char notation
            $canvas_color =  str_repeat(substr($canvas_color, 0, 1), 2) . str_repeat(substr($canvas_color, 1, 1), 2) . str_repeat(substr($canvas_color, 2, 1), 2);
        } else if (strlen($canvas_color) != 6) {
            $canvas_color = DEFAULT_CC; // on error return default canvas color
         }

        $canvas_color_R = hexdec (substr ($canvas_color, 0, 2));
        $canvas_color_G = hexdec (substr ($canvas_color, 2, 2));
        $canvas_color_B = hexdec (substr ($canvas_color, 4, 2));

        // Create a new transparent color for image
        // If is a png and PNG_IS_TRANSPARENT is false then remove the alpha transparency
        // (and if is set a canvas color show it in the background)
        if(preg_match('/^image\/png$/i', $mimeType) && !PNG_IS_TRANSPARENT && $canvas_trans){
            $color = imagecolorallocatealpha ($canvas, $canvas_color_R, $canvas_color_G, $canvas_color_B, 127);       
        }else{
            $color = imagecolorallocatealpha ($canvas, $canvas_color_R, $canvas_color_G, $canvas_color_B, 0);
        }


        // Completely fill the background of the new image with allocated color.
        imagefill ($canvas, 0, 0, $color);

        // scale down and add borders
        if ($zoom_crop == 2) {

            $final_height = $height * ($new_width / $width);

            if ($final_height > $new_height) {

                $origin_x = $new_width / 2;
                $new_width = $width * ($new_height / $height);
                $origin_x = round ($origin_x - ($new_width / 2));

            } else {

                $origin_y = $new_height / 2;
                $new_height = $final_height;
                $origin_y = round ($origin_y - ($new_height / 2));

            }

        }

        // Restore transparency blending
        imagesavealpha ($canvas, true);

        if ($zoom_crop > 0) {

            $src_x = $src_y = 0;
            $src_w = $width;
            $src_h = $height;

            $cmp_x = $width / $new_width;
            $cmp_y = $height / $new_height;

            // calculate x or y coordinate and width or height of source
            if ($cmp_x > $cmp_y) {

                $src_w = round ($width / $cmp_x * $cmp_y);
                $src_x = round (($width - ($width / $cmp_x * $cmp_y)) / 2);

            } else if ($cmp_y > $cmp_x) {

                $src_h = round ($height / $cmp_y * $cmp_x);
                $src_y = round (($height - ($height / $cmp_y * $cmp_x)) / 2);

            }

            // positional cropping!
            if ($align) {
                if (strpos ($align, 't') !== false) {
                    $src_y = 0;
                }
                if (strpos ($align, 'b') !== false) {
                    $src_y = $height - $src_h;
                }
                if (strpos ($align, 'l') !== false) {
                    $src_x = 0;
                }
                if (strpos ($align, 'r') !== false) {
                    $src_x = $width - $src_w;
                }
            }

            imagecopyresampled ($canvas, $image, $origin_x, $origin_y, $src_x, $src_y, $new_width, $new_height, $src_w, $src_h);

        } else {

            // copy and resize part of an image with resampling
            imagecopyresampled ($canvas, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);

        }

        if ($filters != '' && function_exists ('imagefilter') && defined ('IMG_FILTER_NEGATE')) {
            // apply filters to image
            $filterList = explode ('|', $filters);
            foreach ($filterList as $fl) {

                $filterSettings = explode (',', $fl);
                if (isset ($imageFilters[$filterSettings[0]])) {

                    for ($i = 0; $i < 4; $i ++) {
                        if (!isset ($filterSettings[$i])) {
                            $filterSettings[$i] = null;
                        } else {
                            $filterSettings[$i] = (int) $filterSettings[$i];
                        }
                    }

                    switch ($imageFilters[$filterSettings[0]][1]) {

                        case 1:

                            imagefilter ($canvas, $imageFilters[$filterSettings[0]][0], $filterSettings[1]);
                            break;

                        case 2:

                            imagefilter ($canvas, $imageFilters[$filterSettings[0]][0], $filterSettings[1], $filterSettings[2]);
                            break;

                        case 3:

                            imagefilter ($canvas, $imageFilters[$filterSettings[0]][0], $filterSettings[1], $filterSettings[2], $filterSettings[3]);
                            break;

                        case 4:

                            imagefilter ($canvas, $imageFilters[$filterSettings[0]][0], $filterSettings[1], $filterSettings[2], $filterSettings[3], $filterSettings[4]);
                            break;

                        default:

                            imagefilter ($canvas, $imageFilters[$filterSettings[0]][0]);
                            break;

                    }
                }
            }
        }

        // sharpen image
        if ($sharpen && function_exists ('imageconvolution')) {

            $sharpenMatrix = array (
                    array (-1,-1,-1),
                    array (-1,16,-1),
                    array (-1,-1,-1),
                    );

            $divisor = 8;
            $offset = 0;

            imageconvolution ($canvas, $sharpenMatrix, $divisor, $offset);

        }
        //Straight from Wordpress core code. Reduces filesize by up to 70% for PNG's
        if ( (IMAGETYPE_PNG == $origType || IMAGETYPE_GIF == $origType) && function_exists('imageistruecolor') && !imageistruecolor( $image ) && imagecolortransparent( $image ) > 0 ){
            imagetruecolortopalette( $canvas, false, imagecolorstotal( $image ) );
        }

        $imgType = "";
        $tempfile = tempnam($this->cacheDirectory, 'timthumb_tmpimg_');
        if(preg_match('/^image\/(?:jpg|jpeg)$/i', $mimeType)){
            $imgType = 'jpg';
            imagejpeg($canvas, $tempfile, $quality);
        } else if(preg_match('/^image\/png$/i', $mimeType)){
            $imgType = 'png';
            imagepng($canvas, $tempfile, floor($quality * 0.09));
        } else if(preg_match('/^image\/gif$/i', $mimeType)){
            $imgType = 'gif';
            //echo $tempfile;
            //exit;
            imagegif($canvas, $tempfile);
        } else {
            return $this->sanityFail("Could not match mime type after verifying it previously.");
        }

        if($imgType == 'png' && OPTIPNG_ENABLED && OPTIPNG_PATH && @is_file(OPTIPNG_PATH)){
            $exec = OPTIPNG_PATH;
            $this->debug(3, "optipng'ing $tempfile");
            $presize = filesize($tempfile);
            $out = `$exec -o1 $tempfile`; //you can use up to -o7 but it really slows things down
            clearstatcache();
            $aftersize = filesize($tempfile);
            $sizeDrop = $presize - $aftersize;
            if($sizeDrop > 0){
                $this->debug(1, "optipng reduced size by $sizeDrop");
            } else if($sizeDrop < 0){
                $this->debug(1, "optipng increased size! Difference was: $sizeDrop");
            } else {
                $this->debug(1, "optipng did not change image size.");
            }
        } else if($imgType == 'png' && PNGCRUSH_ENABLED && PNGCRUSH_PATH && @is_file(PNGCRUSH_PATH)){
            $exec = PNGCRUSH_PATH;
            $tempfile2 = tempnam($this->cacheDirectory, 'timthumb_tmpimg_');
            $this->debug(3, "pngcrush'ing $tempfile to $tempfile2");
            $out = `$exec $tempfile $tempfile2`;
            $todel = "";
            if(is_file($tempfile2)){
                $sizeDrop = filesize($tempfile) - filesize($tempfile2);
                if($sizeDrop > 0){
                    $this->debug(1, "pngcrush was succesful and gave a $sizeDrop byte size reduction");
                    $todel = $tempfile;
                    $tempfile = $tempfile2;
                } else {
                    $this->debug(1, "pngcrush did not reduce file size. Difference was $sizeDrop bytes.");
                    $todel = $tempfile2;
                }
            } else {
                $this->debug(3, "pngcrush failed with output: $out");
                $todel = $tempfile2;
            }
            @unlink($todel);
        }

        $this->debug(3, "Rewriting image with security header.");
        $tempfile4 = tempnam($this->cacheDirectory, 'timthumb_tmpimg_');
        $context = stream_context_create ();
        $fp = fopen($tempfile,'r',0,$context);
        file_put_contents($tempfile4, $this->filePrependSecurityBlock . $imgType . ' ?' . '>'); //6 extra bytes, first 3 being image type
        file_put_contents($tempfile4, $fp, FILE_APPEND);
        fclose($fp);
        @unlink($tempfile);
        $this->debug(3, "Locking and replacing cache file.");
        $lockFile = $this->cachefile . '.lock';
        $fh = fopen($lockFile, 'w');
        if(! $fh){
            return $this->error("Could not open the lockfile for writing an image.");
        }
        if(flock($fh, LOCK_EX)){
            @unlink($this->cachefile); //rename generally overwrites, but doing this in case of platform specific quirks. File might not exist yet.
            rename($tempfile4, $this->cachefile);
            flock($fh, LOCK_UN);
            fclose($fh);
            @unlink($lockFile);
        } else {
            fclose($fh);
            @unlink($lockFile);
            @unlink($tempfile4);
            return $this->error("Could not get a lock for writing.");
        }
        $this->debug(3, "Done image replace with security header. Cleaning up and running cleanCache()");
        imagedestroy($canvas);
        imagedestroy($image);
        return true;
    }
    protected function calcDocRoot(){
        $docRoot = @$_SERVER['DOCUMENT_ROOT'];
        if (defined('LOCAL_FILE_BASE_DIRECTORY')) {
            $docRoot = LOCAL_FILE_BASE_DIRECTORY;  
        }
        if(!isset($docRoot)){
            $this->debug(3, "DOCUMENT_ROOT is not set. This is probably windows. Starting search 1.");
            if(isset($_SERVER['SCRIPT_FILENAME'])){
                $docRoot = str_replace( '\\', '/', substr($_SERVER['SCRIPT_FILENAME'], 0, 0-strlen($_SERVER['PHP_SELF'])));
                $this->debug(3, "Generated docRoot using SCRIPT_FILENAME and PHP_SELF as: $docRoot");
            }
        }
        if(!isset($docRoot)){
            $this->debug(3, "DOCUMENT_ROOT still is not set. Starting search 2.");
            if(isset($_SERVER['PATH_TRANSLATED'])){
                $docRoot = str_replace( '\\', '/', substr(str_replace('\\\\', '\\', $_SERVER['PATH_TRANSLATED']), 0, 0-strlen($_SERVER['PHP_SELF'])));
                $this->debug(3, "Generated docRoot using PATH_TRANSLATED and PHP_SELF as: $docRoot");
            }
        }
        if($docRoot && $_SERVER['DOCUMENT_ROOT'] != '/'){ $docRoot = preg_replace('/\/$/', '', $docRoot); }
        $this->debug(3, "Doc root is: " . $docRoot);
        $this->docRoot = $docRoot;

    }
    protected function getLocalImagePath($src){
        $src = ltrim($src, '/'); //strip off the leading '/'
        if(! $this->docRoot){
            $this->debug(3, "We have no document root set, so as a last resort, lets check if the image is in the current dir and serve that.");
            //We don't support serving images outside the current dir if we don't have a doc root for security reasons.
            $file = preg_replace('/^.*?([^\/\\\\]+)$/', '$1', $src); //strip off any path info and just leave the filename.
            if(is_file($file)){
                return $this->realpath($file);
            }
            return $this->error("Could not find your website document root and the file specified doesn't exist in timthumbs directory. We don't support serving files outside timthumb's directory without a document root for security reasons.");
        } //Do not go past this point without docRoot set

        //Try src under docRoot
        if(file_exists ($this->docRoot . '/' . $src)) {
            $this->debug(3, "Found file as " . $this->docRoot . '/' . $src);
            $real = $this->realpath($this->docRoot . '/' . $src);
            if(stripos($real, $this->docRoot) === 0){
                return $real;
            } else {
                $this->debug(1, "Security block: The file specified occurs outside the document root.");
                //allow search to continue
            }
        }
        //Check absolute paths and then verify the real path is under doc root
        $absolute = $this->realpath('/' . $src);
        if($absolute && file_exists($absolute)){ //realpath does file_exists check, so can probably skip the exists check here
            $this->debug(3, "Found absolute path: $absolute");
            if(! $this->docRoot){ $this->sanityFail("docRoot not set when checking absolute path."); }
            if(stripos($absolute, $this->docRoot) === 0){
                return $absolute;
            } else {
                $this->debug(1, "Security block: The file specified occurs outside the document root.");
                //and continue search
            }
        }
       
        $base = $this->docRoot;
       
        // account for Windows directory structure
        if (strstr($_SERVER['SCRIPT_FILENAME'],':')) {
            $sub_directories = explode('\\', str_replace($this->docRoot, '', $_SERVER['SCRIPT_FILENAME']));
        } else {
            $sub_directories = explode('/', str_replace($this->docRoot, '', $_SERVER['SCRIPT_FILENAME']));
        }

        foreach ($sub_directories as $sub){
            $base .= $sub . '/';
            $this->debug(3, "Trying file as: " . $base . $src);
            if(file_exists($base . $src)){
                $this->debug(3, "Found file as: " . $base . $src);
                $real = $this->realpath($base . $src);
                if(stripos($real, $this->realpath($this->docRoot)) === 0){
                    return $real;
                } else {
                    $this->debug(1, "Security block: The file specified occurs outside the document root.");
                    //And continue search
                }
            }
        }
        return false;
    }
    protected function realpath($path){
        //try to remove any relative paths
        $remove_relatives = '/\w+\/\.\.\//';
        while(preg_match($remove_relatives,$path)){
            $path = preg_replace($remove_relatives, '', $path);
        }
        //if any remain use PHP realpath to strip them out, otherwise return $path
        //if using realpath, any symlinks will also be resolved
        return preg_match('#^\.\./|/\.\./#', $path) ? realpath($path) : $path;
    }
    protected function toDelete($name){
        $this->debug(3, "Scheduling file $name to delete on destruct.");
        $this->toDeletes[] = $name;
    }
    protected function serveWebshot(){
        $this->debug(3, "Starting serveWebshot");
        $instr = "Please follow the instructions at http://code.google.com/p/timthumb/ to set your server up for taking website screenshots.";
        if(! is_file(WEBSHOT_CUTYCAPT)){
            return $this->error("CutyCapt is not installed. $instr");
        }
        if(! is_file(WEBSHOT_XVFB)){
            return $this->Error("Xvfb is not installed. $instr");
        }
        $cuty = WEBSHOT_CUTYCAPT;
        $xv = WEBSHOT_XVFB;
        $screenX = WEBSHOT_SCREEN_X;
        $screenY = WEBSHOT_SCREEN_Y;
        $colDepth = WEBSHOT_COLOR_DEPTH;
        $format = WEBSHOT_IMAGE_FORMAT;
        $timeout = WEBSHOT_TIMEOUT * 1000;
        $ua = WEBSHOT_USER_AGENT;
        $jsOn = WEBSHOT_JAVASCRIPT_ON ? 'on' : 'off';
        $javaOn = WEBSHOT_JAVA_ON ? 'on' : 'off';
        $pluginsOn = WEBSHOT_PLUGINS_ON ? 'on' : 'off';
        $proxy = WEBSHOT_PROXY ? ' --http-proxy=' . WEBSHOT_PROXY : '';
        $tempfile = tempnam($this->cacheDirectory, 'timthumb_webshot');
        $url = $this->src;
        if(! preg_match('/^https?:\/\/[a-zA-Z0-9\.\-]+/i', $url)){
            return $this->error("Invalid URL supplied.");
        }
        $url = preg_replace('/[^A-Za-z0-9\-\.\_\~:\/\?\#\[\]\@\!\$\&\'\(\)\*\+\,\;\=]+/', '', $url); //RFC 3986
        //Very important we don't allow injection of shell commands here. URL is between quotes and we are only allowing through chars allowed by a the RFC
        // which AFAIKT can't be used for shell injection.
        if(WEBSHOT_XVFB_RUNNING){
            putenv('DISPLAY=:100.0');
            $command = "$cuty $proxy --max-wait=$timeout --user-agent=\"$ua\" --javascript=$jsOn --java=$javaOn --plugins=$pluginsOn --js-can-open-windows=off --url=\"$url\" --out-format=$format --out=$tempfile";
        } else {
            $command = "$xv --server-args=\"-screen 0, {$screenX}x{$screenY}x{$colDepth}\" $cuty $proxy --max-wait=$timeout --user-agent=\"$ua\" --javascript=$jsOn --java=$javaOn --plugins=$pluginsOn --js-can-open-windows=off --url=\"$url\" --out-format=$format --out=$tempfile";
        }
        $this->debug(3, "Executing command: $command");
        $out = `$command`;
        $this->debug(3, "Received output: $out");
        if(! is_file($tempfile)){
            $this->set404();
            return $this->error("The command to create a thumbnail failed.");
        }
        $this->cropTop = true;
        if($this->processImageAndWriteToCache($tempfile)){
            $this->debug(3, "Image processed succesfully. Serving from cache");
            return $this->serveCacheFile();
        } else {
            return false;
        }
    }
    protected function serveExternalImage(){
        if(! preg_match('/^https?:\/\/[a-zA-Z0-9\-\.]+/i', $this->src)){
            $this->error("Invalid URL supplied.");
            return false;
        }
        $tempfile = tempnam($this->cacheDirectory, 'timthumb');
        $this->debug(3, "Fetching external image into temporary file $tempfile");
        $this->toDelete($tempfile);
        #fetch file here
        if(! $this->getURL($this->src, $tempfile)){
            @unlink($this->cachefile);
            touch($this->cachefile);
            $this->debug(3, "Error fetching URL: " . $this->lastURLError);
            $this->error("Error reading the URL you specified from remote host." . $this->lastURLError);
            return false;
        }

        $mimeType = $this->getMimeType($tempfile);
        if(! preg_match("/^image\/(?:jpg|jpeg|gif|png)$/i", $mimeType)){
            $this->debug(3, "Remote file has invalid mime type: $mimeType");
            @unlink($this->cachefile);
            touch($this->cachefile);
            $this->error("The remote file is not a valid image.");
            return false;
        }
        if($this->processImageAndWriteToCache($tempfile)){
            $this->debug(3, "Image processed succesfully. Serving from cache");
            return $this->serveCacheFile();
        } else {
            return false;
        }
    }
    public static function curlWrite($h, $d){
        fwrite(self::$curlFH, $d);
        self::$curlDataWritten += strlen($d);
        if(self::$curlDataWritten > MAX_FILE_SIZE){
            return 0;
        } else {
            return strlen($d);
        }
    }
    protected function serveCacheFile(){
        $this->debug(3, "Serving {$this->cachefile}");
        if(! is_file($this->cachefile)){
            $this->error("serveCacheFile called in timthumb but we couldn't find the cached file.");
            return false;
        }
        $fp = fopen($this->cachefile, 'rb');
        if(! $fp){ return $this->error("Could not open cachefile."); }
        fseek($fp, strlen($this->filePrependSecurityBlock), SEEK_SET);
        $imgType = fread($fp, 3);
        fseek($fp, 3, SEEK_CUR);
        if(ftell($fp) != strlen($this->filePrependSecurityBlock) + 6){
            @unlink($this->cachefile);
            return $this->error("The cached image file seems to be corrupt.");
        }
        $imageDataSize = filesize($this->cachefile) - (strlen($this->filePrependSecurityBlock) + 6);
        $this->sendImageHeaders($imgType, $imageDataSize);
        $bytesSent = @fpassthru($fp);
        fclose($fp);
        if($bytesSent > 0){
            return true;
        }
        $content = file_get_contents ($this->cachefile);
        if ($content != FALSE) {
            $content = substr($content, strlen($this->filePrependSecurityBlock) + 6);
            echo $content;
            $this->debug(3, "Served using file_get_contents and echo");
            return true;
        } else {
            $this->error("Cache file could not be loaded.");
            return false;
        }
    }
    protected function sendImageHeaders($mimeType, $dataSize){
        if(! preg_match('/^image\//i', $mimeType)){
            $mimeType = 'image/' . $mimeType;
        }
        if(strtolower($mimeType) == 'image/jpg'){
            $mimeType = 'image/jpeg';
        }
        $gmdate_expires = gmdate ('D, d M Y H:i:s', strtotime ('now +10 days')) . ' GMT';
        $gmdate_modified = gmdate ('D, d M Y H:i:s') . ' GMT';
        // send content headers then display image
        header ('Content-Type: ' . $mimeType);
        header ('Accept-Ranges: none'); //Changed this because we don't accept range requests
        header ('Last-Modified: ' . $gmdate_modified);
        header ('Content-Length: ' . $dataSize);
        if(BROWSER_CACHE_DISABLE){
            $this->debug(3, "Browser cache is disabled so setting non-caching headers.");
            header('Cache-Control: no-store, no-cache, must-revalidate, max-age=0');
            header("Pragma: no-cache");
            header('Expires: ' . gmdate ('D, d M Y H:i:s', time()));
        } else {
            $this->debug(3, "Browser caching is enabled");
            header('Cache-Control: max-age=' . BROWSER_CACHE_MAX_AGE . ', must-revalidate');
            header('Expires: ' . $gmdate_expires);
        }
        return true;
    }
    protected function securityChecks(){
    }
    protected function param($property, $default = ''){
        if (isset ($_GET[$property])) {
            return $_GET[$property];
        } else {
            return $default;
        }
    }
    protected function openImage($mimeType, $src){
        switch ($mimeType) {
            case 'image/jpeg':
                $image = imagecreatefromjpeg ($src);
                break;

            case 'image/png':
                $image = imagecreatefrompng ($src);
                break;

            case 'image/gif':
                $image = imagecreatefromgif ($src);
                break;
           
            default:
                $this->error("Unrecognised mimeType");
        }

        return $image;
    }
    protected function getIP(){
        $rem = @$_SERVER["REMOTE_ADDR"];
        $ff = @$_SERVER["HTTP_X_FORWARDED_FOR"];
        $ci = @$_SERVER["HTTP_CLIENT_IP"];
        if(preg_match('/^(?:192\.168|172\.16|10\.|127\.)/', $rem)){
            if($ff){ return $ff; }
            if($ci){ return $ci; }
            return $rem;
        } else {
            if($rem){ return $rem; }
            if($ff){ return $ff; }
            if($ci){ return $ci; }
            return "UNKNOWN";
        }
    }
    protected function debug($level, $msg){
        if(DEBUG_ON && $level <= DEBUG_LEVEL){
            $execTime = sprintf('%.6f', microtime(true) - $this->startTime);
            $tick = sprintf('%.6f', 0);
            if($this->lastBenchTime > 0){
                $tick = sprintf('%.6f', microtime(true) - $this->lastBenchTime);
            }
            $this->lastBenchTime = microtime(true);
            error_log("TimThumb Debug line " . __LINE__ . " [$execTime : $tick]: $msg");
        }
    }
    protected function sanityFail($msg){
        return $this->error("There is a problem in the timthumb code. Message: Please report this error at
<a href='http://code.google.com/p/timthumb/issues/list'>timthumb's bug tracking page</a>: $msg");
    }
    protected function getMimeType($file){
        $info = getimagesize($file);
        if(is_array($info) && $info['mime']){
            return $info['mime'];
        }
        return '';
    }
    protected function setMemoryLimit(){
        $inimem = ini_get('memory_limit');
        $inibytes = timthumb::returnBytes($inimem);
        $ourbytes = timthumb::returnBytes(MEMORY_LIMIT);
        if($inibytes < $ourbytes){
            ini_set ('memory_limit', MEMORY_LIMIT);
            $this->debug(3, "Increased memory from $inimem to " . MEMORY_LIMIT);
        } else {
            $this->debug(3, "Not adjusting memory size because the current setting is " . $inimem . " and our size of " . MEMORY_LIMIT . " is smaller.");
        }
    }
    protected static function returnBytes($size_str){
        switch (substr ($size_str, -1))
        {
            case 'M': case 'm': return (int)$size_str * 1048576;
            case 'K': case 'k': return (int)$size_str * 1024;
            case 'G': case 'g': return (int)$size_str * 1073741824;
            default: return $size_str;
        }
    }
    protected function getURL($url, $tempfile){
        $this->lastURLError = false;
        $url = preg_replace('/ /', '%20', $url);
        if(function_exists('curl_init')){
            $this->debug(3, "Curl is installed so using it to fetch URL.");
            self::$curlFH = fopen($tempfile, 'w');
            if(! self::$curlFH){
                $this->error("Could not open $tempfile for writing.");
                return false;
            }
            self::$curlDataWritten = 0;
            $this->debug(3, "Fetching url with curl: $url");
            $curl = curl_init($url);
            curl_setopt ($curl, CURLOPT_TIMEOUT, CURL_TIMEOUT);
            curl_setopt ($curl, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/534.30 (KHTML, like Gecko) Chrome/12.0.742.122 Safari/534.30");
            curl_setopt ($curl, CURLOPT_RETURNTRANSFER, TRUE);
            curl_setopt ($curl, CURLOPT_HEADER, 0);
            curl_setopt ($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
            curl_setopt ($curl, CURLOPT_WRITEFUNCTION, 'timthumb::curlWrite');
            @curl_setopt ($curl, CURLOPT_FOLLOWLOCATION, true);
            @curl_setopt ($curl, CURLOPT_MAXREDIRS, 10);
           
            $curlResult = curl_exec($curl);
            fclose(self::$curlFH);
            $httpStatus = curl_getinfo($curl, CURLINFO_HTTP_CODE);
            if($httpStatus == 404){
                $this->set404();
            }
            if($curlResult){
                curl_close($curl);
                return true;
            } else {
                $this->lastURLError = curl_error($curl);
                curl_close($curl);
                return false;
            }
        } else {
            $img = @file_get_contents ($url);
            if($img === false){
                $err = error_get_last();
                if(is_array($err) && $err['message']){
                    $this->lastURLError = $err['message'];
                } else {
                    $this->lastURLError = $err;
                }
                if(preg_match('/404/', $this->lastURLError)){
                    $this->set404();
                }

                return false;
            }
            if(! file_put_contents($tempfile, $img)){
                $this->error("Could not write to $tempfile.");
                return false;
            }
            return true;
        }

    }
    protected function serveImg($file){
        $s = getimagesize($file);
        if(! ($s && $s['mime'])){
            return false;
        }
        header ('Content-Type: ' . $s['mime']);
        header ('Content-Length: ' . filesize($file) );
        header ('Cache-Control: no-store, no-cache, must-revalidate, max-age=0');
        header ("Pragma: no-cache");
        $bytes = @readfile($file);
        if($bytes > 0){
            return true;
        }
        $content = @file_get_contents ($file);
        if ($content != FALSE){
            echo $content;
            return true;
        }
        return false;

    }
    protected function set404(){
        $this->is404 = true;
    }
    protected function is404(){
        return $this->is404;
    }
}