function.make_thumb.php

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<?php
 
// include secure.php to protect this file and the whole CMS!
if(!defined("SEC_FILE")){define("SEC_FILE",'/framework/secure.php' );}
if (defined('LEPTON_PATH')) {   
    include LEPTON_PATH.SEC_FILE;
} else {
    $oneback = "../";
    $root = $oneback;
    $level = 1;
    while (($level < 10) && (!file_exists($root.SEC_FILE))) {
        $root .= $oneback;
        $level += 1;
    }
    if (file_exists($root.SEC_FILE)) { 
        include $root.SEC_FILE;  
    } else {
        trigger_error(sprintf("[ <b>%s</b> ] Can't include secure.php!", $_SERVER['SCRIPT_NAME']), E_USER_ERROR);
    }
}
// end include secure file
 
 
function make_thumb( $source, $destination, $size )
{
    // Check if GD is installed
    if(extension_loaded('gd') && function_exists('imageCreateFromJpeg') && function_exists('imageCreateFromPng'))
    {       
        // Get the type
        $aTemp = explode(".", $source);
        $sMimeType = strtolower( array_pop($aTemp) );
        
        // First figure out the size of the thumbnail
        list($original_x, $original_y) = getimagesize($source);
        if ($original_x > $original_y)
        {
            $thumb_w = $size;
            $thumb_h = $original_y*($size/$original_x);
        }
        if ($original_x < $original_y)
        {
            $thumb_w = $original_x*($size/$original_y);
            $thumb_h = $size;
        }
        if ($original_x == $original_y)
        {
            $thumb_w = $size;
            $thumb_h = $size;   
        }
 
        $thumb_w = intval($thumb_w);
        $thumb_h = intval($thumb_h);
        
        // Now make the thumbnail
        switch( $sMimeType )
        {
            case "jpeg":
            case "jpg":
            
                $source = imageCreateFromJpeg($source);
                $dst_img = ImageCreateTrueColor($thumb_w, $thumb_h);
                imagecopyresampled($dst_img,$source,0,0,0,0,$thumb_w,$thumb_h,$original_x,$original_y);
                imagejpeg($dst_img, $destination, 90);
                
                break;
                
            case "png":
            
                $source = imagecreatefrompng ($source);
                $dst_img = ImageCreateTrueColor($thumb_w, $thumb_h);
                
                imagealphablending( $dst_img, false );
                imagesavealpha( $dst_img, true );               
                
                imagecopyresampled($dst_img,$source,0,0,0,0,$thumb_w,$thumb_h,$original_x,$original_y);
                imagepng($dst_img, $destination);
 
                break;
                
            case "gif":
            
                $source = imagecreatefromgif ($source);
                $dst_img = ImageCreateTrueColor($thumb_w, $thumb_h);
                imagecopyresampled($dst_img,$source,0,0,0,0,$thumb_w,$thumb_h,$original_x,$original_y);
                imagegif($dst_img, $destination);               
                break;
                
            default:
                return false;
        }
        
        // Clear memory
        imagedestroy($dst_img);
        imagedestroy($source);
        
        return true;
    } 
    else
    {
        return false;
    }
}