Return a JSON object.
Construct a PHP array such as $json_data = array('result' => 0,
'error' => 'This is an error'). End your PHP script with json_encode
($json_data). Then you can reference del.result and del.error (I'm
referring to your definition of the' success' function from your
sample code)
On Jan 4, 7:16 am, rob303 <r...@cube33.com> wrote:
> Hi,
>
> I'm new to ajax and jquery but I'm not new to PHP. The following
> example seems to work okay to a point but I can't figure out how to
> handle data validation errors generated in my PHP.
>
> In my example I want to post some data to a script called ajax.php.
> That script will check the data for validity and then return true or
> false depending on the outcome of the checks. It will also set an
> appropriate error message.
>
> How can I handle the returned data and display an error message if
> needed in ajax?
>
> ----------------------
> HTML / Ajax - test.php
> ----------------------
> <?php
>
> require_once("includes.php");
>
> ?>
> <html>
> <head>
> <script src="js/jquery.js" type="text/javascript"></script>
> <script type="text/javascript">
> $(document).ready(function(){
> $("form#submit").submit(function() {
> var email = $('#email').attr('value');
> $.ajax({
> type: "POST",
> url: "ajax.php",
> data: "email="+ email,
> success: function(del){
> $('form#submit').hide();
> $('div.success').fadeIn('medium');
> // what if the data failed validation in PHP?
> // we need to show 'div.error".
> }
> });
> return false;
> });
> });
> </script>
> </head>
> <body>
> <form id="submit" method="post">
> Email:
> <input id="email" class="text" name="email" size="20"
> type="text" />
> <input type="submit" value="send mail" />
> </form>
> <div class="success" style="display:none;">
> Email sent.
> </div>
> <div class="error">
> <?php echo $userError; ?>
> </div>
> </body>
> </html
>
> ----------------------
> PHP - ajax.php
> ----------------------
> <?php
>
> require_once("includes.php");
>
> $message = $_POST['email'];
>
> if($message != '') {
> mail('some-em...@email.com', 'Ajax test', $message);
> return 1;} else {
>
> $userError = "Please enter your email address";
> return 0;
>
> }
>
> ?>
>
> I've been searching the web for an answer but can't find one
> anywhere! Any help would be greatly appreciated.
