Fatal error: Uncaught Error: Call to undefined function mysql_select_db() in C:\phpstudy_pro\WWW\dzg_db.php:5 Stack trace: #0 C:\phpstudy_pro\WWW\dzg.php(5): getVersionInfo(NULL) #1 {main} thrown in C:\phpstudy_pro\WWW\dzg_db.php on line 5