Fatal error: Uncaught Error: Call to undefined function mysql_connect() in E:\phpStudy\PHPTutorial\WWW\xy9414\source\core\class.mysql.php:22 Stack trace: #0 E:\phpStudy\PHPTutorial\WWW\xy9414\source\core\run.php(69): chency_mysql->connect('127.0.0.1', 'root', 'root', 'xy9414', 'utf8', 0, true) #1 E:\phpStudy\PHPTutorial\WWW\xy9414\index.php(11): require('E:\\phpStudy\\PHP...') #2 {main} thrown in E:\phpStudy\PHPTutorial\WWW\xy9414\source\core\class.mysql.php on line 22