Fatal error: Uncaught Error: Call to undefined function mysql_connect() in /home3/hamidrez/public_html/travel/_includes/php/DatabaseConfig.php:15 Stack trace: #0 /home3/hamidrez/public_html/travel/header.php(7): require_once() #1 /home3/hamidrez/public_html/travel/index.php(1): include('/home3/hamidrez...') #2 {main} thrown in /home3/hamidrez/public_html/travel/_includes/php/DatabaseConfig.php on line 15