Create a socket connection using PHP

Open a Unix socket connection to Cloud SQL for PostgreSQL by using the PHP Data Objects (PDO) extension.

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Code sample


// $username = 'your_db_user';
// $password = 'yoursupersecretpassword';
// $dbName = 'your_db_name';
// $connectionName = getenv("INSTANCE_CONNECTION_NAME");
// $socketDir = getenv('DB_SOCKET_DIR') ?: '/cloudsql';

// Connect using UNIX sockets
$dsn = sprintf(

// Connect to the database.
$conn = new PDO($dsn, $username, $password, $connConfig);

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