<input type="image"> doesnt seem to be posting.

Question

I can't figure out why...

This works:

<?php
    if($_POST['test']) echo "posted";

?>

<form method="POST" action="<?php echo $_SERVER['PHP_SELF']; ?>">
    <input type="submit" name="test" />
</form>

and this doesn't:

<?php
    if($_POST['test']) echo "posted";

?>

<form method="POST" action="<?php echo $_SERVER['PHP_SELF']; ?>">
    <input type="image" name="test" src="images/button.submit.png" />
</form>

Answer 1

When you post via an image the x/y coordinates that were clicked on are sent instead. Check $_POST['test_x'] and $_POST['test_y']

Answer 2

Image inputs only post the x and y co-ordinates of where the click happened, not (necessarily) a value. If you really want to use an image in this way, you may want to add a hidden field too.