Isset () / Empty (), arrays and ternary operator

If you need to check if there is any value in the array, and if not, set the default value for the variable, you will do something like this

$authToken = isset($response['fbData']['authResponse']['accessToken']) ? $response['fbData']['authResponse']['accessToken'] : null;

I wonder if there is a way to make this somehow more readable?

There is a short version of the ternary operator

$authToken = $sourceVar ?: null;

There is no need to repeat the source code here a second time, but it does not work with arrays, because if I use $response['fbData']['authResponse']['accessToken']instead $sourceVar, I will get a php warning message.

I can use @

$authToken = @$response['fbData']['authResponse']['accessToken'] ?: null;

I heard that they made "@" really fast in PHP 5.4, but I still don't like it.

I could use something like this

$a = isset($response['fbData']['authResponse']['accessToken']) ?: null;

But in this case, I will get TRUE as the result, the result isset().

So maybe someone knows how to do it right?

1: PHP? , " PHP" . . , PHP, ( - $response['fbData']['authResponse']['accessToken'] , ).

2: , NikiC (. ). : Php , , - :

function myIsset (&$var, $defaultVal = null) {
    return isset($var) ? $var : $defaultVal;
}

$authToken = myIsset($response['fbData']['authResponse']['accessToken']);

UPD2 10/27/2015: PHP 7 ?? ( ), : , NULL; .

$authToken = $response['fbData']['authResponse']['accessToken'] ?? 'any_default_value';

- php notice!

, , :

$username = $_GET['user'] ?? $_POST['user'] ?? 'nobody';