Add variable to an array only if it has a value in PHP?

Question

I am passing variable to my index view in Yii2 framework. I have the following code:

return $this->render('index', array(
    'userresult' => $userresult,
    'topresult' => $topresult,
    'result' => $result
));

I only need to pass variable $userresult if user is logged in since if user is not logged in, the $userresult variable does not exist. This is what I tried but I can not get the if statement to run:

return $this->render('index', array(
    if (!\Yii::$app->user->isGuest) { echo "'userresult' => $userresult"; },
    'topresult' => $topresult,
    'result' => $result
));

How can this be achieved?

arogachev · Accepted Answer · 2015-05-08 11:34:27Z

3

One of the ways to do it:

// Initial array
$params = [
    'topresult' => $topresult,
    'result' => $result,
];

// Conditionally add other elements to array
if (!\Yii::$app->user->isGuest) {
    $params['userresult'] = $userresult
}

return $this->render('index', $params);

Mixing echo with array is obviously wrong. You should learn more about arrays in plain PHP.

Also you can forget about array() syntax, use shorter variation [] since Yii2 requires PHP >= 5.4.

And I think it's better to pass null instead:

return $this->render('index', [
    'userresult' => $userresult ?: null,
    'topresult' => $topresult,
    'result' => $result
]);

Then you check if the variable is null or not, or just if ($userresult) { ... } in view. I think it's better then using isset in view. That way params number is constant.

edited May 8, 2015 at 11:34

answered May 8, 2015 at 11:26

arogachev

33.6k8 gold badges119 silver badges118 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

Sunday Over a year ago

Does this code go to my config or my current script?

arogachev Over a year ago

In your current script. Also see suggested alternative.

Sunday Over a year ago

Ok, I just tried it on my current script and it worked. You sir is a boss! Thanks for your help once again.

Collectives™ on Stack Overflow

Add variable to an array only if it has a value in PHP?

1 Answer 1

3 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

3 Comments

Your Answer

Sign up or log in

Post as a guest

Related