Unset php session variable

Question

I'm passing an id by ajax to be removed by $_SESSION. The ajax part works fine, the php receive in POST the id, but the vairable can't be unset. Why??? Here my code:

The ajax part:

    $(".delete").live('click', function(e){
    e.preventDefault();
    var id_to_remove = $(this).attr('id');
    //alert(id_to_remove);
    $.ajax({
        type: "POST",
        url: 'inc/functions/remove_item_from_cart.php',
        data: { id : id_to_remove },
        success: function(data) {
          $("#content").load('inc/functions/get_checkout_content.php');
            alert(data);
        }
    })

});

The php receiving part:

session_start();
if(isset($_SESSION['cart']) && isset($_POST['id'])){
//echo var_dump($_SESSION['cart']);
$ncart=$_SESSION['cart'];
if (count($ncart)>0){
    unset($ncart[$_POST['id']]); // this is NOT working!!!
    $ncart=array_values($ncart);

    $_SESSION['cart']=$ncart;
    if(count($ncart)==0){
        unset($_SESSION['cart']);
        unset($_SESSION['cart_total']);
        echo "all_empty";
    } // this if part is the only working!
}
}

Any helpful suggestion why I can't unset the session variable? Thanks!

And what exactly doesn't work with this code? We won't guess what's going wrong... — Till Helge
– Till Helge, Commented Mar 2, 2013 at 19:21
What version of jQuery are you using? .live() is now deprecated. — user1781710
– user1781710, Commented Mar 2, 2013 at 19:21
Sorry, but just to confirm, is this process correct: $ncart=$_SESSION['cart']; to $ncart=array_values($ncart); to $_SESSION['cart']=$ncart;? — Michael
– Michael, Commented Mar 2, 2013 at 19:23
i suspect you must change if(count($ncart)==0) to if(count($_SESSION['cart'])==0) — Mariano Montañez Ureta
– Mariano Montañez Ureta, Commented Mar 2, 2013 at 19:24
@MichaelRushton That just re-numbers the keys in that array to be consecutive after removing one from the middle. It's necessary because of the unusual but powerful nature of PHP's "array" type as simultaneously list/vector and (ordered) hash. — IMSoP
– IMSoP, Commented Mar 2, 2013 at 19:27

Tepken Vannkorn · Accepted Answer · 2014-06-09 07:04:15Z

3

I got my own solution:

if (count($_SESSION['cart'])>0){

 foreach ($_SESSION['cart'] as $key => $subarray){ 
  if ($subarray['id'] == $_POST['id']){ 
  unset($_SESSION['cart'][$key]); 
 break; 
 } 
} 

$_SESSION['cart'] = array_values($_SESSION['cart']);

} else {
 if(count($_SESSION['cart'])==0){
  unset($_SESSION['cart']);
  unset($_SESSION['cart_total']);
  echo "all_empty";
 }  
}

That's because the array was like this:

Array
(
    [0] => Array
        (
            [id] => 3
            [name] => Collier Ano petit
            [price] => 45
            [quant] => 1
            [ptotal] => 45
        )

)

edited Jun 9, 2014 at 7:04

Tepken Vannkorn

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answered Mar 9, 2013 at 14:53

Escudo Bravo

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