php - destroy $_SESSION after clicking 'Cancel' button - Stack Overflow

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I would like to destroy $_SESSION['userList'] after cliking 'Cancel' button. However, the $_SESSION['userList'] is destroied when page load.

Below is my code:

<a href='#' class="btn" onClick="resetForm()"><span>Cancel</span></a>

<script type="text/javascript">

                function resetForm() {
                    <?php

                        unset($_SESSION['userList']);

                    ?>

                }
            </script>

Really appreciate for any help.

I would like to destroy $_SESSION['userList'] after cliking 'Cancel' button. However, the $_SESSION['userList'] is destroied when page load.

Below is my code:

<a href='#' class="btn" onClick="resetForm()"><span>Cancel</span></a>

<script type="text/javascript">

                function resetForm() {
                    <?php

                        unset($_SESSION['userList']);

                    ?>

                }
            </script>

Really appreciate for any help.

• php
• javascript

Share Improve this question Follow edited Aug 29, 2013 at 16:18 Daniel Daranas 22.6k99 gold badges6565 silver badges121121 bronze badges asked Mar 7, 2012 at 10:06 AcubiAcubi 2,7831111 gold badges4242 silver badges5454 bronze badges

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6 Answers 6

Sorted by: Reset to default 3

You cannot execute PHP (server-side) in your javascript (client-side). You need to issue an HTTP request to invoke PHP. You can do that using AJAX.

JAVASCRIPT

$.ajax({
    type: "POST",
    url: "phppage.php",
    data: "action=unsetsession",
    success: function(msg){
        alert(msg);
        if(msg == "success"){
            //cleared session
        }else{
            //failed
        }
    },
    error: function(msg){
        alert('Error: cannot load page.');
    }
});

PHP

if($_POST['action'] == "unsetsession"){
    unset($_SESSION['userList']);
    echo "success";
}

You can not execute php code in the client side like you try in your example. If you want to to destroy session withou reload then you must use ajax request.

You better use jquery for this

<a href='#' class="btn" onClick="resetForm()"><span>Cancel</span></a>

<script>
function resetForm()
{
    jQuery.ajax({
        type: "POST",
        url: "cancel.php",
        data:,
        cache: false,
        success: function(response)
        {
        }
    });
}
</script>

And create a new cancel.php which will be like this -

<?php
unset($_SESSION['userList']);
?>

You can't call PHP from JS like this. You'll need to do a call back to the server.

Use submit button for Cancel (You can use CSS to make it look the away you want) //HTML

<form method="post" >
<input type="button" value="Cancel" name="cancel" id="cancel" />
</form>

//PHP

if(isset($_POST['cancel'))
{
  unset($_SESSION['userList']);
}

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