php pdo db connection check

php_pdo_connection_check.php

try{
  		    $db = new PDO(DB_STRING, DB_USER, DB_PASSWORD,
			                    array(PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION));
			    $response = array("status" => 1,"message"=> "DB Connection Succesfull");
				die(json_encode($response));
			}
			catch(PDOException $ex){
			    $response = array("status" => 0,"message"=> "DB Connection Failed");
				die(json_encode($response));
			}