Fatal error: Uncaught Error: Call to undefined function mysql_connect() in D:\phpStudy\PHPTutorial\WWW\huochepiao\e\class\connect.php:74 Stack trace: #0 D:\phpStudy\PHPTutorial\WWW\huochepiao\e\space\index.php(9): db_connect() #1 {main} thrown in D:\phpStudy\PHPTutorial\WWW\huochepiao\e\class\connect.php on line 74