使用PHP检查两个键是否存在数组

Question

I'd like to check if array exist by two keys: id and type

This code just check by id:

 if (isset($_POST['type'])) {
   $type = $_POST['type'];
 } 
 else {
   $type = '';
 }

 if (array_key_exists($id, $_SESSION['cart'])) {
        $_SESSION['cart'][$id]['quantity'] += $quantity;
    } else {
        $_SESSION['cart'][$id] = $line;
  }

I have tried with this code but it doesn't work:

 if (array_key_exists($id, $_SESSION['cart']) && array_key_exists($type, $_SESSION['cart'])) {
        $_SESSION['cart'][$id]['quantity'] += $quantity;
    } else {
        $_SESSION['cart'][$id] = $line;
    }

$_SESSION['cart'] is an array contains arrays of $line

 $line = array(
        'id' => $id,
        'type' => $type,
        'quantity' => $quantity,
        'price' => $price,
        'picture' => $dish->getPicture()->getWebPath(),
    );

This is the output of $_SESSION['cart']:

As you see in th last array with id 55 and type "french bred" , what I'd like to do is to check if th user chose the same product but a with different type so insert new line else if the same product and the same type so just update quantity.

Answer 1

Something like this should do, however the question is too vague and too little code is shown for me to properly understand your problem

$lineExists = false;
    foreach($_SESSION['cart'] as $index => $line){
        if($line['id'] === $id)
        {
            $_SESSION['cart'][$index]['quantity'] += $quantity;
            $lineExists = true;
        }
    }
    if(!$lineExists)
    {
        $_SESSION['cart'][] = $newLine;
    }