function check_image_name($name) { $allowed = array("jpg", "jpeg", "png", "gif"); $extension = Util::getFileExtension($name); if (!empty($extension)) { $extension = strtolower($extension); } if (empty($extension) || !in_array($extension, $allowed)) { $message = sprintf("error uploading %s : only JPG, JPEG, GIF, or PNG allowed", $name); $data = array("code" => 500, "error" => $message); echo json_encode($data); exit; } }