start jquery function if i set session?

Question

I have a login form on my page index.php:

    <form name="login" id="login" action="include/login.php" method="post" onsubmit="return validateForm()"> 
    <h21>Username</h21><br/>
    <input type="text" class="login_form_front" id="myusername" name="myusername"><br/>
    <h21>Password</h21><br/>
    <input type="password" class="login_form_front" autocomplete="off"  id="mypassword" name="mypassword">
    <br/>
    <input type="submit" class="buttons_login" value="Login" id="login" name="login">
    </form> 


<?php if (isset($_SESSION['failed_login'])) {
*run my jquery code*
unset($_SESSION['failed_login']); } ?>

this then runs my script login.php:

$sql = "select * from $tbl_name where user_name = '$myusername' AND password = '$mypassword";
$result = mysql_query($sql) or die( mysql_error() );
$row = mysql_fetch_assoc($result);

if(!$row) {
$_SESSION['failed_login'] = 'my session';  
header("location:../index.php");  

}else{

include 'dashboard.php';

what I want to do is if their is no result, i.e. the username and password do not match then return back to my index page and set a session.

Then If the session is set I want to run a piece of jquery on my index page. Is this possible?

Yes it's possible. But you don't want to check username and password with Jquery alone. Because if somebody turns javascript off, they can login without legit username/password. — Refilon, Mar 02 '15 at 10:46
Yes of course you can refer this [question](http://stackoverflow.com/questions/3057317/run-a-javascript-function-from-a-php-if-statement) it might helps you. — Rikesh, Mar 02 '15 at 10:46

score 0 · Answer 1 · answered Mar 02 '15 at 11:06

0

Of course it is possible. It's called a 'flash session' in most terminologies, a session which lasts for one server request (aka redirection to the same page), and then destroyed.

This is the way to do it, keep it up. :)

answered Mar 02 '15 at 11:06

Shay

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silviup · Accepted Answer · 2015-03-03T18:32:42.493

You need to use session_start(); to make sure a session is started (as soon as possible in your script, probably that would be beginning of index.php). Then to run the jQuery code you need to do something like this:

<?php if (isset($_SESSION['failed_login'])) {
  unset($_SESSION['failed_login']);?>
  <script>
    $(function() {
    // Do whatever you need to do with jQuery here
    });
  </script>
<?php }?>

start jquery function if i set session?

2 Answers2