Warning: Undefined variable $conn in /customers/8/3/1/jagjag.biz/httpd.www/passthru.php on line 2

Fatal error: Uncaught TypeError: mysqli_real_escape_string(): Argument #1 ($mysql) must be of type mysqli, null given in /customers/8/3/1/jagjag.biz/httpd.www/passthru.php:2
Stack trace:
#0 /customers/8/3/1/jagjag.biz/httpd.www/passthru.php(2): mysqli_real_escape_string(NULL, 'http://hitleap....')
#1 {main}
  thrown in /customers/8/3/1/jagjag.biz/httpd.www/passthru.php on line 2