[google-cloud-sql-discuss] Trying to Connect to database in PHP using PDO and Cloud SQL Proxy

I tried to connect  to database in  PHP using PDO and Cloud SQL Proxy but have no luck. I keep getting 

Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[HY000] [2002] No such file or directory'

Im using

<?php

ini_set('display_errors', 1);

ini_set('display_startup_errors', 1);

$pdo = new PDO('mysql:unix_socket=/cloudsql/<your-project-id>:<your-instance-name>;dbname=db', 

'db', 

'db'

);

$statement = $pdo->query("SHOW TABLES;");

$row = $statement->fetch(PDO::FETCH_ASSOC);

echo htmlentities($row['_message']);

?>

Has anyone had any luck connecting

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