database connection with OPENSHIFT

i am try to connect phpmyadmin database using my php script in OPENSHIFT
i am using sftp to upload file in openshift
doing this for connection

index.php

<?php 
 try {
                require_once 'conf.php';
                $conn = mysqlConnector();
                $stmt = $conn->prepare('SELECT * FROM demo');
                $stmt->execute();

                while($row = $stmt->fetch()) {
                        print_r($row);          
                }


        } catch(PDOException $e) {
                echo 'ERROR: ' . $e->getMessage();
        }

?>

conf.php

<?php
define('DB_HOST', getenv('127.*.**.*'));
define('DB_PORT',getenv('****')); 
define('DB_USER',getenv('admin4*****'));
define('DB_PASS',getenv('databasePassword'));
define('DB_NAME',getenv('ssh://5348030a***************@landbayscaling-innovifytest.rhcloud.com/~/git/landbayscaling.git/'));

function mysqlConnector(){
    $dsn = 'mysql:dbname='.DB_BASE.';host='.DB_HOST.';port='.DB_PORT;
    $dbh = new PDO($dsn, DB_USER, DB_PASS);
    $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    return $dbh;
    }
?>

Url Of Opensift

Error is this:-

ERROR: SQLSTATE[HY000] [2002] Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)