Why Do I Get a 'Call to undefined function mysql_connect()' Error in PHP?

Undefined Function mysql_connect() Error in PHP

Problem Statement:

Developers may encounter the "Fatal error: Call to undefined function mysql_connect()" when attempting to use the deprecated mysql_* functions in PHP. The error persists even after installing the appropriate package and restarting the necessary services.

Solution:

In PHP 7 and above, the mysql_* functions have been replaced by the PDO or mysqli_* functions. Developers are recommended to update their code accordingly. However, if it is not immediately feasible, a workaround exists.

Workaround:

For a temporary solution, developers can create the fix_mysql.inc.php file, which recreates the old mysql_* functions using the mysqli_*() functions. This file should be included at the beginning of the PHP scripts using the mysql_* functions.

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