so in my php I have something like this
$_SESSION['opened'] = true; But It will not be set to true until user will perform some actions with some other html\php pages
So I need on some Ajax function to be able get this session variable. And some PHP sample of function to get variable in form ready for Ajax to get it.
so I need something to AJAX requesting to an action (to some simple php code) which will return a value from $_SESSION.
How to do such thing?
Simple jQuery example:
var session; $.ajaxSetup({cache: false}) $.get('getsession.php', function (data) { session = data; }); And getsession.php:
<?php session_start(); print json_encode($_SESSION); You're not required to use jQuery for AJAX, but I highly recommend it.
Edit:
In response to:
I want to be able to tell my JS function what variable I want to get.
You can try this (untested):
var session; $.ajaxSetup({cache: false}) $.get('getsession.php', {requested: 'foo'}, function (data) { session = data; }); And the PHP:
<?php session_start(); if (isset($_GET['requested'])) { // return requested value print $_SESSION[$_GET['requested']]; } else { // nothing requested, so return all values print json_encode($_SESSION); } Have a look at the $.get documentation for a more detailed overview.
$.get syntax without worrying about it caching.
PHP File at http://my.host/response.php
<?php session_start(); if(isset($_SESSION['opened'])) echo "true"; ?> Then in HTML, Add jQuery such as:
<script type="text/javascript" src="/path/to/jQuery-x.y.z.js"></script> Then:
<script type="text/javascript"> $(document).ready(function(){ $.ajax({ url:'/response.php', cache:false, success:function(data){ // Do something with the result if(data=="true"){ $('#mydiv').show(); }else{ $('#mydiv').hide(); } } ); }); </script> And add to myform.php:
<h1>Some Random HTML</h1> <div id='mydiv' class="<?php if(isset($_SESSION['opened']) && $_SESSION['opened']) echo "hidden_class";?>"> ...</div> As this will give a consistent experience to those without JavaScript. You don't have to be showing/hiding a div. You could do anything really.
session_start() to initialize the session data.