$src_image = $creteFun($filename);

$dst_image = imagecreatetruecolor($dst_w, $dst_h);

$color = imagecolorallocate($dst_image, 255, 255, 255);

imagefill($dst_image,0,0,$color);

imagecopyresampled($dst_image, $src_image, 0, 0, 0, 0, $dst_w, $dst_h, $src_w, $src_h);