php code to connect mysql wtih different port

connect_DB_with_port.php

<?php 
//for default MySQL port 3306
//$servername = "127.0.0.1";
//for MySQL deployed on port 3308
$servername = "127.0.0.1:3308";
$username = "root";
$password = "";
try {
    $pdo = new PDO("mysql:host=$servername;", $username, $password);
    // set the PDO error mode to exception
    $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    echo "Connected successfully"; 
	echo $pdo->query('select version()')->fetchColumn();
    }
catch(PDOException $e)
    {
    echo "Connection failed: " . $e->getMessage();
    }
?>