How to resize a GIF

rename($_FILES['image']['tmp_name'], $image_path);



// chmod($image_path,0755);



list($photo_width,$photo_height) = getimagesize($image_path);

  

if ($img_size[2] == 1) $photo_resource = imagecreatefromgif($image_path);

elseif ($img_size[2] == 3) $photo_resource = imagecreatefrompng($image_path);

else $photo_resource = imagecreatefromjpeg($image_path);



$photo_resource_resized = imagecreatetruecolor($new_width, $new_height);



if ($img_size[2] == 1)

{

  $originaltransparentcolor = imagecolortransparent( $photo_resource );

  if ($originaltransparentcolor >= 0 && $originaltransparentcolor < imagecolorstotal($photo_resource))

{

  $transparentcolor = imagecolorsforindex( $photo_resource, $originaltransparentcolor );

  $newtransparentcolor = imagecolorallocate($photo_resource_resized, $transparentcolor['red'], $transparentcolor['green'],$transparentcolor['blue']);

  imagefill( $photo_resource_resized, 0, 0, $newtransparentcolor );

  imagecolortransparent( $photo_resource_resized, $newtransparentcolor );

}

}



imagecopyresampled($photo_resource_resized, $photo_resource, 0, 0, 0, 0, $new_width, $new_height, $photo_width, $photo_height);

	  

if ($img_size[2] == 1) imagegif($photo_resource_resized,$image_path);

elseif ($img_size[2] == 3) imagepng($photo_resource_resized,$image_path);

else imagejpeg($photo_resource_resized,$image_path);