What are the recommended steps to fix the "Call to undefined function mysql_pconnect()" error in PHP 5.0.2?

The "Call to undefined function mysql_pconnect()" error in PHP 5.0.2 occurs when the mysql extension is not enabled in the PHP configuration. To fix this issue, you need to enable the mysql extension in your php.ini file by uncommenting or adding the following line: extension=mysql.so (for Linux) or extension=php_mysql.dll (for Windows).

// Enable the mysql extension in php.ini
extension=mysql.so