Fatal error: Uncaught Error: Call to undefined function mysql_connect() in C:\phpStudy\PHPTutorial\WWW\core\config.php:28 Stack trace: #0 C:\phpStudy\PHPTutorial\WWW\tq.php(5): include_once() #1 {main} thrown in C:\phpStudy\PHPTutorial\WWW\core\config.php on line 28