Fehlermeldung - Druckversion

Code:
<?php

/**

 * MyBB 1.4

 * Copyright © 2008 MyBB Group, All Rights Reserved

 *

 * Website: http://www.mybboard.net

 * License: http://www.mybboard.net/about/license

 *

 * $Id: functions_image.php 4224 2008-10-05 11:17:04Z Tikitiki $

 */



/**

 * Generates a thumbnail based on specified dimensions (supports png, jpg, and gif)

 * 

 * @param string the full path to the original image

 * @param string the directory path to where to save the new image

 * @param string the filename to save the new image as

 * @param integer maximum hight dimension

 * @param integer maximum width dimension

 * @return array thumbnail on success, error code 4 on failure

 */

function generate_thumbnail($file, $path, $filename, $maxheight, $maxwidth)

{

    if(!function_exists("imagecreate"))

    {

        $thumb['code'] = 3;

        return $thumb;

    }

    list($imgwidth, $imgheight, $imgtype, $imgattr, $imgbits, $imgchan) = getimagesize($file);

    if($imgwidth == 0 || $imgheight == 0)

    {

        $thumb['code'] = 3;

        return $thumb;

    }        

    if(($imgwidth >= $maxwidth) || ($imgheight >= $maxheight))

    {

        check_thumbnail_memory($imgwidth, $imgheight, $imgtype, $imgbits, $imgchan);

        

        if($imgtype == 3)

        {

            if(@function_exists("imagecreatefrompng"))

            {

                $im = @imagecreatefrompng($file);

            }

        }

        elseif($imgtype == 2)

        {

            if(@function_exists("imagecreatefromjpeg"))

            {

                $im = @imagecreatefromjpeg($file);

            }

        }

        elseif($imgtype == 1)

        {

            if(@function_exists("imagecreatefromgif"))

            {

                $im = @imagecreatefromgif($file);

            }

        }

        else

        {

            $thumb['code'] = 3;

            return $thumb;

        }

        if(!$im)

        {

            $thumb['code'] = 3;

            return $thumb;

        }

        $scale = scale_image($imgwidth, $imgheight, $maxwidth, $maxheight);

        $thumbwidth = $scale['width'];

        $thumbheight = $scale['height'];

        $thumbim = @imagecreatetruecolor($thumbwidth, $thumbheight);

        

        if(!$thumbim)

        {

            $thumbim = @imagecreate($thumbwidth, $thumbheight);

            $resized = true;

        }

        

        // Attempt to preserve the transparency if there is any

        $trans_color = imagecolortransparent($im);

        if($trans_color >= 0 && $trans_color < imagecolorstotal($im))

        {

            $trans = imagecolorsforindex($im, $trans_colors);

            $new_trans_color = imagecolorallocate($thumbim, $trans['red'], $trans['blue'], $trans['green']);

            imagefill($thumbim, 0, 0, $new_trans_color);

            imagecolortransparent($thumbim, $new_trans_color);

        }

        

        if(!isset($resized))

        {

            @imagecopyresampled($thumbim, $im, 0, 0, 0, 0, $thumbwidth, $thumbheight, $imgwidth, $imgheight);

        }

        else

        {

            @imagecopyresized($thumbim, $im, 0, 0, 0, 0, $thumbwidth, $thumbheight, $imgwidth, $imgheight);

        }

        @imagedestroy($im);

        if(!function_exists("imagegif") && $imgtype == 1)

        {

            $filename = str_replace(".gif", ".jpg", $filename);

        }

        switch($imgtype)

        {

            case 1:

                if(function_exists("imagegif"))

                {

                    @imagegif($thumbim, $path."/".$filename);

                }

                else

                {

                    @imagejpeg($thumbim, $path."/".$filename);

                }

                break;

            case 2:

                @imagejpeg($thumbim, $path."/".$filename);

                break;

            case 3:

                @imagepng($thumbim, $path."/".$filename);

                break;

        }

        @my_chmod($path."/".$filename, '0666');

        @imagedestroy($thumbim);

        $thumb['code'] = 1;

        $thumb['filename'] = $filename;

        return $thumb;

    }

    else

    {

        return array("code" => 4);

    }

}



/**

 * Attempts to allocate enough memory to generate the thumbnail

 * 

 * @param integer hight dimension

 * @param integer width dimension

 * @param string one of the IMAGETYPE_XXX constants indicating the type of the image

 * @param string the bits area the number of bits for each color

 * @param string the channels - 3 for RGB pictures and 4 for CMYK pictures

 */

function check_thumbnail_memory($width, $height, $type, $bitdepth, $channels)

{

    if(!function_exists("memory_get_usage"))

    {

        return false;

    }



    $memory_limit = @ini_get("memory_limit");

    if(!$memory_limit || $memory_limit == -1)

    {

        return false;

    }



    $limit = preg_match("#^([0-9]+)\s?([kmg])b?$#i", trim(my_strtolower($memory_limit)), $matches);

    $memory_limit = 0;

    if($matches[1] && $matches[2])

    {

        switch($matches[2])

        {

            case "k":

                $memory_limit = $matches[1] * 1024;

                break;

            case "m":

                $memory_limit = $matches[1] * 1048576;

                break;

            case "g":

                $memory_limit = $matches[1] * 1073741824;

        }

    }

    $current_usage = memory_get_usage();

    $free_memory = $memory_limit - $current_usage;

    

    $thumbnail_memory = round(($width * $height * $bitdepth * $channels / 8) * 5);

    $thumbnail_memory += 2097152;

    

    if($thumbnail_memory > $free_memory)

    {

        if($matches[1] && $matches[2])

        {

            switch($matches[2])

            {

                case "k":

                    $memory_limit = (($memory_limit+$thumbnail_memory) / 1024)."K";

                    break;

                case "m":

                    $memory_limit = (($memory_limit+$thumbnail_memory) / 1048576)."M";

                    break;

                case "g":

                    $memory_limit = (($memory_limit+$thumbnail_memory) / 1073741824)."G";

            }

        }

        

        @ini_set("memory_limit", $memory_limit);

    }

}



/**

 * Figures out the correct dimensions to use

 * 

 * @param integer current hight dimension

 * @param integer current width dimension

 * @param integer max hight dimension

 * @param integer max width dimension

 * @return array correct height & width

 */

function scale_image($width, $height, $maxwidth, $maxheight)

{

    $width = intval($width);

    $height = intval($height);

    

    if(!$width) $width = $maxwidth;

    if(!$height) $height = $maxheight;

    

    $newwidth = $width;

    $newheight = $height;



    if($width > $maxwidth)

    {

        $newwidth = $maxwidth;

        $newheight = ceil(($height*(($maxwidth*100)/$width))/100);

        $height = $newheight;

        $width = $newwidth;

            }

    if($height > $maxheight)