<?php if(isset($_GET["step2"])){ //User has entered step2 echo "Thank you"; }else{ //User is on first step if(isset($_POST["button"])){ //Button has been pressed if(isset($_POST["field1"]) && isset($_POST["field2"])) { //Fields are filled out.. do stuff header("Location: main.php?step2"); }else{ echo "Please fill in all fields correctly"; } } ?> <form method="post"> <input type="text" name="field1" /> <input type="text" name="field2" /> <input type="submit" name="button" value="Do it" /> </form> <?php }