Wordpress paveikslėlių įkėlimas

Sveiki,

Į WP sistema įsikelia iki 2 MB paveikslėliai, tačiau mano nuotraukos yra didesnės ir išmeta tokią klaidą:,

Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 11264 bytes) in public_html/wp-content/themes/Tema/library/functions/image_resizer.php on line 11

čia dar įdedu image_resizer.php kodą. Kaip padaryti, kad leistinas nuotraukos dydis būtų ~ 4 MB?

<?php
class SimpleImage {

  var $image;
  var $image_type;

  function load($filename) {
     $image_info = getimagesize($filename);
     $this->image_type = $image_info[2];
     if( $this->image_type == IMAGETYPE_JPEG ) {
        $this->image = imagecreatefromjpeg($filename);
     } elseif( $this->image_type == IMAGETYPE_GIF ) {
        $this->image = imagecreatefromgif($filename);
     } elseif( $this->image_type == IMAGETYPE_PNG ) {
        $this->image = imagecreatefrompng($filename);
     }
  }
  function save($filename, $image_type=IMAGETYPE_JPEG, $compression=75, $permissions=null) {
     if( $image_type == IMAGETYPE_JPEG ) {
        imagejpeg($this->image,$filename,$compression);
     } elseif( $image_type == IMAGETYPE_GIF ) {
        imagegif($this->image,$filename);         
     } elseif( $image_type == IMAGETYPE_PNG ) {
        imagepng($this->image,$filename);
     }   
     if( $permissions != null) {
        chmod($filename,$permissions);
     }
  }
  function output($image_type=IMAGETYPE_JPEG) {
     if( $image_type == IMAGETYPE_JPEG ) {
        imagejpeg($this->image);
     } elseif( $image_type == IMAGETYPE_GIF ) {
        imagegif($this->image);         
     } elseif( $image_type == IMAGETYPE_PNG ) {
        imagepng($this->image);
     }   
  }
  function getWidth() {
     return imagesx($this->image);
  }
  function getHeight() {
     return imagesy($this->image);
  }
  function resizeToHeight($height) {
     $ratio = $height / $this->getHeight();
     $width = $this->getWidth() * $ratio;
     $this->resize($width,$height);
  }
  function resizeToWidth($width) {
     $ratio = $width / $this->getWidth();
     $height = $this->getheight() * $ratio;
     $this->resize($width,$height);
  }
  function scale($scale) {
     $width = $this->getWidth() * $scale/100;
     $height = $this->getheight() * $scale/100; 
     $this->resize($width,$height);
  }
  function resize($width,$height) {
     $new_image = imagecreatetruecolor($width, $height);
     imagecopyresampled($new_image, $this->image, 0, 0, 0, 0, $width, $height, $this->getWidth(), $this->getHeight());
     $this->image = $new_image;   
  }      
}

if(!$image_obj)
{
$image_obj = new SimpleImage();
}

/*include('SimpleImage.php');
  $image = new SimpleImage();
  $image->load('picture.jpg');
  $image->resize(250,400);
  $image->save('picture2.jpg');


  include('SimpleImage.php');
  $image = new SimpleImage();
  $image->load('picture.jpg');
  $image->resizeToWidth(250);
  $image->save('picture2.jpg');

include('SimpleImage.php');
  $image = new SimpleImage();
  $image->load('picture.jpg');
  $image->scale(50);
  $image->save('picture2.jpg');

*/

?>

Šiuo atveju tiesiog trūksta RAM apdoroti nuotraukai (įprastai tiek nereikėtų, bet WP automatiškai gamina miniatūras ir pan.). Jei shared hostingas - bandyk šnekėt su administracija, o galbūt suveiks ir toks dalykas:

ini_set('memory_limit', '128M');