CODEWITHSUNDEEP
phplaravel-5
Jay Julian Payne
Jay Julian Payne

Reputation: 780

PHP foreach - undefined variable?

I'm using Laravel 5.3's query builder, trying to add a where clause to find articles with a certain tag:

$tag_list = $request->tag_list; // tag_list is an array
if (isset($tag_list)) {
    foreach ($tag_list as $tag_id) {
        $query = $query->whereHas('tags', function ($query) {
            $query->where('id', $tag_id);
        });
    }
}

When I dump $tag_list I get...

24

But in the loop, I get an error:

Undefined variable: tag_id

What am I doing wrong? Any help is appreciated!

Upvotes: 2

Views: 786

Answers (1)

vuliad
vuliad

Reputation: 2152

Because you are in function context. Pass tag_id variable via - use keyword

$tag_list = $request->tag_list; // tag_list is an array
if (isset($tag_list)) {
    foreach ($tag_list as $tag_id) {
        $query = $query->whereHas('tags', function ($query) use ($tag_id) {
            $query->where('id', $tag_id);
        });
    }
}

Upvotes: 7

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