CODEWITHSUNDEEP
phpsessionforeach
user3322610
user3322610

Reputation: 39

Updating the value inside session cart

$session_cart = $_SESSION['cart'];

foreach($session_cart as $item){
    foreach($item as $item2){
        if($item2['subject'] == "2014 ICAS - Computer Skills"){
            $item2['quantity'] == $sum;
            $item2['total'] == $total;
            $item2['level'] == $newlevelarray;
        }
    }
}

Guys I have the foreach loop above to update the session cart array if user click edit cart, but the foreach loop only updates the $session_cart variable array, it doesn't update to $_SESSION['cart']. How to update item inside the session cart without wiping the rest of the item inside the cart?

Upvotes: 0

Views: 106

Answers (5)

evuez
evuez

Reputation: 3387

Since $session_cart isn't modified, you have to pass it by reference in your foreach loop, and the same goes for $item.

Also, it's = to assign values, not ==

$session_cart = $_SESSION['cart'];

foreach($session_cart as &$item){
    foreach($item as &$item2){
        if($item2['subject'] == "2014 ICAS - Computer Skills"){
            $item2['quantity'] = $sum;
            $item2['total'] = $total;
            $item2['level'] = $newlevelarray;
        }
    }
}

$_SESSION['cart'] = $session_cart;

Upvotes: 1

Yuri Gor
Yuri Gor

Reputation: 1463

finish your code with this line:

$session_cart = unserialize($_SESSION['cart']);
//do smth
$_SESSION['cart'] = serialize($session_cart);

Upvotes: 0

cornelb
cornelb

Reputation: 6066

$session_cart = $_SESSION['cart'];

foreach($session_cart as &$item){
    foreach($item as &$item2){
        if($item2['subject'] == "2014 ICAS - Computer Skills"){
            $item2['quantity'] = $sum;
            $item2['total'] = $total;
            $item2['level'] = $newlevelarray;
        }
    }
}

$_SESSION['cart'] = $session_cart;

replaced $item with &$item references

updated $_SESSION['cart'] at the end

Upvotes: 0

Robert
Robert

Reputation: 20286

You use foreach loop that is why to modify elements you need to create reference via &

$session_cart = $_SESSION['cart'];

foreach($session_cart as &$item){
 foreach($item as &$item2){
    if($item2['subject'] == "2014 ICAS - Computer Skills"){
        $item2['quantity'] = $sum;
        $item2['total'] = $total;
        $item2['level'] = $newlevelarray;
    }
 }
}

When you do as &item then it's referenced not copied and the reference is modified not the copy. Also check your assigment operator which is "=" not "=="

From PHP manual

In order to be able to directly modify array elements within the loop precede $value with &. In that case the value will be assigned by reference.

Upvotes: 0

deviloper
deviloper

Reputation: 7240

I guess you are mistakenly using == 

$session_cart = $_SESSION['cart'];

foreach($session_cart as $item){
    foreach($item as $item2){
        if($item2['subject'] == "2014 ICAS - Computer Skills"){
            $item2['quantity'] = $sum;
            $item2['total'] = $total;
            $item2['level'] = $newlevelarray;
        }
    }
}

Upvotes: 0

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