Fatal error: Uncaught Error: Call to undefined function mysql_connect() in K:\phpStudy\PHPTutorial\WWW\gddx\source\core\class.mysql.php:22 Stack trace: #0 K:\phpStudy\PHPTutorial\WWW\gddx\source\core\run.php(69): chency_mysql->connect('127.0.0.1', 'root', '123456', 'gddx', 'utf8', 0, true) #1 K:\phpStudy\PHPTutorial\WWW\gddx\index.php(11): require('K:\\phpStudy\\PHP...') #2 {main} thrown in K:\phpStudy\PHPTutorial\WWW\gddx\source\core\class.mysql.php on line 22