需要帮助将App Engine PHP与Google Cloud SQL数据库连接

Question

Below is the sql connection code for my php script as it attempts to connect to my Google SQL Cloud Database

<?php

$con=mysqli_connect(":/cloudsql/projectID:google-cloud-instance","root","root","DATABASE");
// Check connection
if (mysqli_connect_errno())
{
echo "Oops! Something Must Have Went Wrong?: " . mysqli_connect_error()
;`

but when I process the overall php script i get the following error:

"php_network_getaddresses: gethostbyname failed. errno=0Error:"

I am a beginner at this, so if someone can help me..

1. Understand what this means
2. How the heck can I fix?

Thanks in Advance for the help!

Answer 1

You need to pass the cloud SQL instance name as the 'socket' parameter to the MySQLi constructor . For example

$instance_name = ":/cloudsql/projectID:google-cloud-instance";
$c = new mysqli(null, $username, $password, $database, 0, $instance_name);

if you're using the default auth (application level auth) then you can pass root and no password to connect.

$instance_name = ":/cloudsql/projectID:google-cloud-instance";
$c = new mysqli(null, "root", "", $database, 0, $instance_name);

Answer 2

See https://developers.google.com/appengine/docs/php/cloud-sql/#PHP_Connecting_to_your_Cloud_SQL_instance . It seems like you are mixing mysqli and mysql_connect syntaxes. Pick one and follow the example in the documentation.

Answer 3

For CloudSQL, it's recommended that you use the unix socket.

If you're using mysqli_connect, you can specify the default socket in php.ini.

php.ini mysqli.default_socket= '/cloudsql/CONNECTION_NAME'

$db = mysqli_connect('localhost', 'USER', 'PASSWORD', 'DB');