PHP - GD-Library -> bilder resizen -> probs bei großen

echo "<form action='resize.php' method='POST' enctype='multipart/form-data'>";
// echo "<input type='hidden' name='MAX_FILE_SIZE' value='350000' />";
echo "<input type='hidden' name='gid' value='".$gid."' />";
echo "<input type='hidden' name='dest_header' value='index.php?id=106&aktion=gal_edit&gid=".$gid."' />";
echo "<input type='hidden' name='dest_width' value='720' />";
echo "<input type='hidden' name='dest_height' value='720' />";
echo "<input type='hidden' name='dest_location' value='bilder/".$gid."/' />";
echo "<input type='hidden' name='dest_thumb_width' value='100' />";
echo "<input type='hidden' name='dest_thumb_height' value='100' />";
echo "<input type='file' name='pic_file' />";
echo "<input type='submit' name='pic_upload' value='hochladen' />";
echo "</form>";

<?php
error_reporting(E_ALL);
include("dbconnect.php");
include("functions.php");
session_start();


$path = "./".$_POST['dest_location'];   	// Speicherordner der Bilder
$thumb_path = $path."thumb/"; 		// Speicherordner der Vorschaubilder
$config_width = $_POST['dest_width']; 	// Bildbreite max. bei großem Bild
$config_height = $_POST['dest_height']; 	// Bildhöhe max. bei großem Bild
if($_POST['dest_thumb_width'])
{ $config_thumb_width = "100"; } 	// Bildbreite max. bei Vorschaubild
if($_POST['dest_thumb_height'])
{ $config_thumb_height = "100"; } 	// Bildhöhe max. bei Vorschaubild
$resizequality = "70"; 			// Bildkompressionsrate 0-100


if (!empty($_FILES['pic_file']))
{
	$filename = $_FILES['pic_file']['name'];
	$filetype = $_FILES['pic_file']['type'];
	$filetmp = $_FILES['pic_file']['tmp_name'];


         // Dateitypen überprüfen
  	switch ($filetype)
  	{
     	  case 'image/jpeg':
     	  case 'image/jpg':
     	  case 'image/pjpeg':
        		$pic_filetype = '.jpg';
        		break;
     	  case 'image/png':
     	  case 'image/x-png':
	        $pic_filetype = '.png';
        		break;
     	  default:
        		die("Falsches Dateiformat. Nur JPEG oder PNG erlaubt!");
  	}


         // Dateinamen vergeben
  	srand((double)microtime()*1000000);
  	do
  	{
     		$pic_filename = md5(uniqid(rand())) . $pic_filetype;
  	}
  	while( file_exists($path.$pic_filename) );


  	// Kopieren ins Zielverzeichnis
  	copy($filetmp, $path.$pic_filename) or die($path);
  	@chmod($path.$pic_filename, 0777);


         // Bildgröße ermitteln
  	$pic_size = getimagesize($path . $pic_filename);
  	$pic_width = $pic_size[0];
  	$pic_height = $pic_size[1];




         // Soll ein Thumbnail erstellt werden? (je nach aufrufendem Formular, siehe Variablenbelegung)
	if( $config_thumb_width )
	{
	         $error = FALSE;
                  // Benötigtes imagecreatefrom je nach Dateityp
	         switch ($pic_filetype)
	         {
	           case '.jpg':
	                 $read_function = 'imagecreatefromjpeg';
	                 break;
	           case '.png':
	                 $read_function = 'imagecreatefrompng';
	                 break;
	         }
	         $src = @$read_function($path.$pic_filename);
	         if (!$src)
	         {
	                 $error = TRUE;
	                 $pic_thumbnail = '';
	         }
                  // Muss das Bild resized werden?
	         else if( ($pic_width > $config_thumb_width) or ($pic_height > $config_thumb_height) )
	         {
	                 // Resize...
	                 if ($pic_width > $pic_height)
	                 {
	                         $thumb_width = $config_thumb_width;
	                         $thumb_height = $config_thumb_width * ($pic_height/$pic_width);
	                 }
	                 else
	                 {
	                         $thumb_height = $config_thumb_height;
	                         $thumb_width = $config_thumb_height * ($pic_width/$pic_height);
	                 }
	                 $thumbnail = @imagecreatetruecolor($thumb_width, $thumb_height);
	                 @imagecopyresampled($thumbnail, $src, 0, 0, 0, 0, $thumb_width, $thumb_height, $pic_width, $pic_height);
	         }
	         else
	         {
	                 $thumbnail = $src;
	         }
	         if (!$error)
	         {
	                 $pic_thumbnail = $pic_filename;
	                 // Thumbnail speichern
	                 switch ($pic_filetype)
	                 {
	                   case '.jpg':
	                         @imagejpeg($thumbnail, $thumb_path.$pic_thumbnail, $resizequality);
	                         break;
	                   case '.png':
	                         @imagepng($thumbnail, $thumb_path.$pic_thumbnail);
	                         break;
	                 }
	                 @chmod($thumb_path . $pic_thumbnail, 0777);
	         }
	} // Thumbnail-resize fertig






 	// Originalbild resizen


   	$error = FALSE;
         // Benötigtes imagecreatefrom je nach Dateityp
   	switch ($pic_filetype)
   	{
   	  case '.jpg':
       		$read_function = 'imagecreatefromjpeg';
       		break;
   	  case '.png':
       		$read_function = 'imagecreatefrompng';
       		break;
   	}
   	$src = @$read_function($path  . $pic_filename);
   	if (!$src)
   	{
     		$error = TRUE;
     		$pic_resize = '';
   	}
         // Muss das Bild resized werden?
   	else if( ($pic_width > $config_width) or ($pic_height > $config_height) )
   	{
     		// Resize...
     		if ( (($pic_width / $pic_height) > ($config_width / $config_height)) )
     		{
       			$resize_width = $config_width;
       			$resize_height = $config_width * ($pic_height/$pic_width);
     		}
     		else
     		{
       			$resize_height = $config_height;
       			$resize_width = $config_height * ($pic_width/$pic_height);
     		}
     		$resize = @imagecreatetruecolor($resize_width, $resize_height);
     		@$imagecopyresampled($resize, $src, 0, 0, 0, 0, $resize_width, $resize_height, $pic_width, $pic_height);
   	}
   	else
   	{
     		$resize = $src;
   	}
   	if (!$error)
   	{
     		$pic_resize = $pic_filename;
		// Bild speichern
     		switch ($pic_filetype)
     		{
     		  case '.jpg':
         		@imagejpeg($resize, $path . $pic_resize, $resizequality);
         		break;
     		  case '.png':
         		@imagepng($resize, $path . $pic_resize);
         		break;
     		}
     		@chmod($path . $pic_resize, 0777);
   	}
}


$host  = $_SERVER['HTTP_HOST'];
$uri   = rtrim(dirname($_SERVER['PHP_SELF']), '/\\');
$extra = $_POST['dest_header'];
header("Location: http://$host$uri/$extra");
exit;
?>