Question

I have a PHP form that I’ve set up with a POST method. When all the fields aren’t filled out I have a Javascript alert box that pops up and states ‘Please fill out all fields!’ When I click ‘OK’ on the alert window it reloads the form behind it clearing all the data that was entered. Is there a function that can keep the alert box’s OK button from reloading the entire page? Here’s my code:

<?php

if (isset($_POST['brandname']) && isset($_POST['firstname']) && isset($_POST['lastname']) && isset($_POST['email']) && isset($_POST['website'])){
    $brandname = $_POST['brandname'];
    $firstname = $_POST['firstname'];
    $lastname = $_POST['lastname'];
    $email = $_POST['email'];
    $website = $_POST['website'];

    if(!empty($brandname) && !empty($firstname) && !empty($lastname) && !empty($email)){
        $to = '[e-mail]';
        $subject = 'Submission Form';
        $body = $firstname;
        $headers = 'From: '.$email;

        if (@mail($to, $subject, $body, $headers)){
        }
    }else{
        echo '<script type="text/javascript">
        window.alert("Please fill out all fields!")
        </script>';
        }

    }
    ?>

Answer 1

You are alerting your user after posting response … in this case I would re-post the whole form again with its values set to $_POST or variables that were set using it, for example :

  <input type='text' name='brandname' value='<?php echo $_POST['brandname'];?>' />

or :

  <input type='text' name='brandname' value='<?php echo $brandname; ?>' />

and so on

But in this case I recommend using client-side validation on the form (Using javascript)