Two forms on one page

My page has both sign up and sign in forms on it and the action attribute of both forms is set to the same address.

<form action="verify.php" method="post" name="signup"> ... </form>
<form action="verify.php" method="post" name="signin"> ... </form>

HTML:

Now in verify.php, how do I know whether the data received was submitted through the sign up form or through the sign in form?

 

You can either use a submit button name="submit" value="Signup" and name="submit" value="Login" to differentiate the two, or simply a hidden field.

 

<form action="verify.php?q=signup" method="post" name="signup"> ... </form>
<form action="verify.php?q=login" method="post" name="signin"> ... </form>

Use this php code:

<?php

if($_GET['q'] == 'signup') {

//signup

}
elseif($_GET['q'] == 'login') {

//Login

}

?>

PHP:

 

If you already got a form, there's no sense in adding in the query string to the action= itself, but rather

<input type="hidden" name="q" value="..."/>