empty function help

[spick]

Hi, need a little help.  I have a form that enters data into a mysql database.  What I want is if the menu_name field is empty then it redirects back to the entry page and if it's not empty it redirects to a content page. 

 

I can't seem to get it to work, when I leave the field empty it stills enters the data to the database and redirects me to the content page.  i follow the lynda.com tutorials and the video example worked but mine didn't for some reason.  The codes are exactly the same except some variables.

 

any help is appreciated.

 

<?php
$errors=array();

//form validation
if(!isset($_POST['menu_name']) || empty($_POST['menu_name'])){
	$errors[]='menu_name';
}

if(!empty($errors)){
	redirect("new_subject.php");
}

?>
<?php
$menu_name = mysql_prep($_POST['menu_name']);
$position = mysql_prep($_POST['position']);
$visible = mysql_prep($_POST['visible']);
?>

[kenrbnsn]

Please post the form that invokes this script.

 

Ken