Warning: session_start() expects parameter 1 to be array, string given in /header.php on line 3

Fatal error: Uncaught Error: Call to undefined function mysql_connect() in /mysql.php:2 Stack trace: #0 /header.php(4): require_once() #1 /index.php(2): require_once('/header.php') #2 {main} thrown in /mysql.php on line 2