Make sum inside each loop Laravel

Question

I am trying to get the sum of a property inside an each loop. Here is my code:

    $client_systems_count = 0;
    $client->accounts->each(function ($account) use ($client_systems_count) {
        dd($account->systems->count());
        $client_systems_count += $account->systems->count();
    });
    dump($client_systems_count);

Any idea why it isn't working? I assume that even though I change the $client_systems_count variable inside the loop every time it goes to the next element inside the collection it resets to it's initial value. So which is the correct approach to get the total systems count?

jeroen · Accepted Answer · 2017-11-17 09:12:44Z

7

This is your problem:

$client->accounts->each(function ($account) use ($client_systems_count) {

Every time the function runs, it uses the $client_systems_count of the outer scope. Which is 0.

In order to modify that value, you need to pass it by reference:

$client->accounts->each(function ($account) use (&$client_systems_count) {
                                                 ^ here

answered Nov 17, 2017 at 9:12

jeroen

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