I use a simple advice from php tutorial: All what you need is an input field and a PHP code to check the entered code. Here is an example code for the HTML form: Access code: <input /><br /> Please enter <b>MYCODE</b> above. Then you can simply the check if the entered code matches, with a PHP help. Please, compare the code in lower-case to avoid issues with a typing in CaSe SeNSiTiVe code: If (strtolower($_POST[âcodeâ]) != 'mycode') {die('Wrong access code');} The form will be submitted only after the time, when the person enters the correct access code. Maybe it is too easy, but it is effective