Setting a PHP $_SESSION['var'] using jQuery

Question

I need to set a PHP $_SESSION variable using the jQuery. IF the user clicks on an image I want to save a piece of information associated with that image as a session variable in php.

I think I can do this by calling a php page or function and appending that piece of info to the query string.

Any ideas. I have found little help through google.

thanks mike

Answer 1

You can't do it through jQuery alone; you'll need a combination of Ajax (which you can do with jQuery) and a PHP back-end. A very simple version might look like this:

HTML:

<img class="foo" src="img.jpg" /> <img class="foo" src="img2.jpg" /> <img class="foo" src="img3.jpg" /> 

Javascript:

$("img.foo").onclick(function() {     // Get the src of the image     var src = $(this).attr("src");      // Send Ajax request to backend.php, with src set as "img" in the POST data     $.post("/backend.php", {"img": src}); }); 

PHP (backend.php):

<?php     // do any authentication first, then add POST variable to session     $_SESSION['imgsrc'] = $_POST['img']; ?>