Fatal error: Uncaught Error: Call to undefined function mysql_connect() in /home/demopa/domains/demopars.ir/public_html/hotel/core/db.php:30 Stack trace: #0 /home/demopa/domains/demopars.ir/public_html/hotel/index.php(26): DB->connect() #1 {main} thrown in /home/demopa/domains/demopars.ir/public_html/hotel/core/db.php on line 30