forms - PHP isset function won't work -

the function not triggered know how make work

if ($logged_in_bool == "true") {     echo "<form action='page-settings.php?name=".$name."' method='post'>         <input type='button' name='delete_page' value='delete page'>         </form> "; } else {   }  $clicked_delete = @$_post['delete_page'];  if (isset($clicked_delete)) {     delete_page(); } else { }  function delete_page() {     echo "page deleted"; }   ?> 

the function not triggered know how make work

why not use type='submit' ? so, how if try change type button type submit, this:

<input type='button' name='delete_page' value='delete page'> 

change to:

<input type='submit' name='delete_page' value='delete page'>