无法使用Google App Engine上的Slim框架连接到Google Cloud SQL

Question

I'm using Slim framework to build api for my application. I'm not able to connect to Google Cloud SQL.

I have provided the error message below.

I have been using this in codeigniter without any problem. Can someone help me understand on how to fix this issue.

DB Code:

function getDB() {

$dbhost=":/cloudsql/projid:instancename";
$dbuser="root";
$dbpass="";
$dbname="dbname";

$dbConnection = new PDO("mysql:host=$dbhost;dbname=$dbname", $dbuser, $dbpass); 
$dbConnection->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
return $dbConnection;
}

Error message

{"error":{"text":SQLSTATE[HY000] [2002] php_network_getaddresses: gethostbyname failed. errno=0}}

PS I'm not facing this issue on Localhost.

Answer 1

Your PDO connection string should be using mysql:unix_socket instead of mysql:host .

https://cloud.google.com/appengine/docs/php/cloud-sql/

PDO_MySQL

$db = new pdo('mysql:unix_socket=/cloudsql/<your-project-id>:<your-instance-name>;dbname=<database-name>',
  'root',  // username
  ''       // password
  );

Answer 2

This is how I changed my code

From

function getDB() {

$dbhost=":/cloudsql/projid:instancename";
$dbuser="root"; 
$dbpass="";
$dbname="dbname";

$dbConnection = new PDO("mysql:host=$dbhost;dbname=$dbname", $dbuser, $dbpass); 
$dbConnection->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
return $dbConnection;
}

To

function getDB() {

    $dbConnection = new pdo('mysql:unix_socket=/cloudsql/<your-project-id>:<your-instance-name>;dbname=<database-name>',
  'root',  // username
  ''       // password
  );
    $dbConnection->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    return $dbConnection;
    }