website fatal error

[xrxr55]

Fatal error: Call to undefined function mssql_connect() in C:\xampp\htdocs\BlackCloud\config.php on line 8
this is the error
$host = '5.242.90.195';
$username = 'sa';
$password = '';
$chinese_jobs = true;
so what wrong althing is right i dont know why i get error ty for helping

[MentaL]