phpBB2 : Redimensionnement des images !

function image_resize_jpeg( $img_source, $img_dest, $img_quality, $size_limit )
{
  if ( !file_exists( $img_source ) )
  {
    return (1); //file not found return 1
  }

  // increase the $size_limit variable by 1 as it is going to be chopped by 1 below
  $size_limit++;

  //load the original image and put its hieght/width in $img_info
  $img_info = getimagesize ( $img_source ); 

  //$img_info ARRAY KEY
  //0 = width
  //1 = hieght
  //2 = image type
  //3 = hight and width string
  $orig_height = $img_info[1]; //source hieght from $img_info
  $orig_width = $img_info[0]; //source width from $img_info

  $jpegQuality = $img_quality; //quality of the JPG

  if(($orig_width > $size_limit) || ($orig_height > $size_limit)) //make sure the image isnt already resized
  { 
    if ( $orig_height > $orig_width )
      $scaledown = $orig_height;
    else
      $scaledown = $orig_width;

    $newscale = $size_limit / $scaledown; //set the new scale size

    //calculate the new aspect ratio
    $new_w = (int)abs($orig_width * $newscale);
    $new_h = (int)abs($orig_height * $newscale);

    //create the blank limited-palette image
    $base_image = imageCreatetruecolor($new_w, $new_h);

    //convert and save it to temp.jpg
    imagejpeg($base_image, 'temp.jpg');
    imagedestroy($base_image);

    //get the image pointer to the temp jpeg
    $image = imageCreateFromJpeg('temp.jpg');

    // get the image pointer to the original image
//    $imageToResize = imageCreateFromJpeg("./$img_source");
    $imageToResize = imageCreateFromJpeg("$img_source");

    //resize the original image over temp.jpg
    // NOTE: of you have GD2, you could also use imageCopyResampled
    //imageCopyResized($image, $imageToResize, 0, 0, 0, 0, $new_w, $new_h, $orig_width, $orig_height);
	imageCopyResampled($image, $imageToResize, 0, 0, 0, 0, $new_w, $new_h, $orig_width, $orig_height);

    $new_image = imageCreatetruecolor($new_w - 1, $new_h - 1);
    imagecopy ($new_image, $image, 0, 0, 0, 0, $new_w - 1, $new_h - 1);

    //create the resized image
    imageJpeg($new_image, "$img_dest", $jpegQuality); //image destination

    imagedestroy($image);
    imagedestroy($new_image);
    imagedestroy($imageToResize);

    unlink('temp.jpg'); //del the temp image file

    return (2); //completed successfully
  }
  else
  {
    return(3); //errors occured
  }
}