sesión de matriz
<?php
$my_arr = array('Saumya', 'Nikita', 'Upasana', 'Dyana');
// use array_push to add 3 elements to end of $my_arr
$new_num = array_push($my_arr, 'Adhikar', 'sanjay', 'Puspendra', 'Mukesh');
// inspect return value of array_push
echo $new_num;
print_r($my_arr);
?>
//my ex
$id = $_GET['PId'];
// $cartArray = array(
// );
// array_push($cartArray, $id);
session_start();
// $_SESSION["cart"] = $cartArray;
$_SESSION['cart'][] = $id;
header("Content-type:application/json");
echo json_encode($_SESSION["cart"]);
SmilingG