javascript-php var post get

Question

That code work:

startSlideshow(<?php echo json_encode(glob("photos-animaux/*.jpg"))?>);

that code dont :

$.post("",{'folder':'animaux'});
startSlideshow(<?php echo json_encode(glob("photos-".$_GET["folder"]."/*.jpg"))?>);

WHY ?, what i am doing wrong ?, help ! why the stupid php fonction just dont make the string right !! ahhhh!

---new infos---- that line work :

startSlideshow(<?php echo json_encode(glob("photos-".$_GET["folder"]."/*.jpg")) ?>);

because if i MANUALLY enter in the address bar ?folder=animaux...bam! work

so the problem shoul be there : $.get("photo-portfolio.php",{folder:"animaux"});

still dont know where !

Answer 1

If you're using $.post() from JQuery, you should use $_POST['folder'] to access your variable. If you use $.get(), then you use $_GET['folder'] in PHP. Try changing that $_GET to $_POST.

Answer 2

Change $_GET["folder"] to $_POST["folder"] ?

You can dump the $_POST to be sure you're getting the right info..

echo '<pre>', print_r( $_POST, 1), '</pre>';

Answer 3

I hope you're not literally writing these two lines together and hope they are interacting, are you?

$.post("",{'folder':'animaux'});
startSlideshow(<?php echo json_encode(glob("photos-".$_GET["folder"]."/*.jpg"))?>);

PHP runs on the server, Javascript in the browser. In the above two lines, if written like this, the PHP is already long done by the time $.post() is called.

PHP processes the code on the server and sends this to the browser:

$.post("",{'folder':'animaux'});
startSlideshow(['something.jpg', 'something2.jpg']);

The browser executes this code:

1. Post {'folder':animaux'} to "" (no effect whatsoever).
2. Start a slideshow with ['something.jpg', 'something2.jpg'] (which was already decided by the time the page loaded).

I hope you're aware of this two stage process.