从Cart Sessin Array中删除值的php会话问题

Question

I am using Yii Framework and am unable to remove a value from a session. When I call the function using ajax, I get this error in console

Indirect modification of overloaded element of CHttpSession has no effect

Any suggestion will be helpful thanks in advance . Below is my code

public function actiondeleteproductajax() {
    $session = Yii::app()->session;
    $id = isset($_POST['id']) ? $_POST['id'] : "";
    $key = array_search($id, $session['cart_items']);
    if ($key !== false) {
        unset($session['cart_items'][$key]);
        echo 'success';
    }
}

i want to remove index of array because value containt similar ids of products added more than one time

Answer 1

Try this:

$cartItems = Yii::app()->session['cart_items'];
$id = isset($_POST['id']) ? $_POST['id'] : "";
$key = array_search($id, $cartItems);
if ($key !== false) {
    unset($cartItems[$key]);
    echo 'success';
}
Yii::app()->session['cart_items'] = $cartItems;

You cannot directly modify the session item, it is internally handled by yii with getters and setters, so unset() will have no effect, hence the warning. You can however unset an item in your copy $cartItems and assign the remaining array back to the session object.