Question

I want to validate form fields when submitting the form, I use isset() to check if the field has a value or not. The problem I face that it returns true if the field has a value of does not !!!!!

here’s HTML code

<form action="handler.php" method="post">
<label>userName: </label><input type="text" name="fname" /><br/>
</form>

and here’s php code

<?php error_reporting(E_ALL);

if(validateForm()){?>

Welcome <?php echo $_POST["fname"]; ?>.<br />
}

function validateForm(){
     $empty=false;
     $empty=isset($_POST['fname'])?'true':'false';
     echo 'empty>>>>'.$empty;
     return $empty;
 }

?>

Answer 1

What you want to use is empty :

function validateForm(){
     return !empty($_POST['fname']);
}

edit : removed isset() as it wasn’t necessary. Thanks to @Julian.