PHPUnit未定义函数mysql_connect（）

Question

When I try to connect to my MySQL database from PHP code all seems to be fine, all queries are executed successfully. However, when the code is tested with unit tests in PHPUnit, I get the following fatal PHP error:

PHP Fatal error: Call to undefined function mysql_connect().

As indicated, this code works fine outside of unit tests, but PHPUnit generates errors.

Answer 1

It's likely you're using a namespace, and therefore mysql_query or MySQLi is undefined there.

Try the following:

$mysqli = new \MySQLi(...);

Answer 2

I believe that you're testing with a version of PHP 7 or higher.

In the php documentation mysql_query , they describe the following

Warning This extension was deprecated in PHP 5.5.0, and it was removed in PHP 7.0.0. Instead, the MySQLi or PDO_MySQL extension should be used. See also MySQL: choosing an API guide and related FAQ for more information. Alternatives to this function include: mysqli_query() PDO::query()

So, two possible solutions:

1. Downgrade PHP to a lower version (< 7);
2. Replace your mysql functions with MySQLi or PDO.