Warning: Undefined variable $user_login_ok in /virtual/htdocs/ikou_www/qanda2.html on line 3

Fatal error: Uncaught Error: Call to undefined function mysql_connect() in /virtual/htdocs/ikou_www/incdb.php:20
Stack trace:
#0 /virtual/htdocs/ikou_www/qanda2.html(5): include()
#1 {main}
  thrown in /virtual/htdocs/ikou_www/incdb.php on line 20