PHP: Map and join array of objects

Question

Feels like it should be easy...

function flattenTags($t) {
  return ($t['name']);
}
$tags = array($Fan->getTags());
$flat_tags = array_map('self::flattenTags', $tags);
$string_tags = join(', ', $flat_tags);

where tags is an array of objects each with multiple properties.

Error:

Cannot use object of type yii\\db\\ActiveQuery as array

In JS this is a simple array.map().join(). Can't get it to work with PHP. Please help!

EDIT: do I need some kind of await like JS?

Does this answer your question? Yii2 - ActiveRecord to Array — C3roe
– C3roe, Commented May 5, 2020 at 9:35
Not really, this is refering to ActiveRecord not ActiveQuery. Any other suggestions? — chrisheseltine
– chrisheseltine, Commented May 5, 2020 at 10:12
ActiveQuery has the same method, as the person asking the question there states right at the beginning … And you can easily go read up on it in the documentation, when in doubt. yiiframework.com/doc/api/2.0/yii-db-activequery — C3roe
– C3roe, Commented May 5, 2020 at 10:15
Apolagies I'm brand new to PHP and Yii so I'm struggling a little, I don't have time to fully learn them from the docs. Is the line you're referring to asArray()? — chrisheseltine
– chrisheseltine, Commented May 5, 2020 at 10:27
When I try that I get Call to a member function asArray() on array. So I cannot call asArray() because it is already an array, but when passing it to map it's not an array. Any ideas? — chrisheseltine
– chrisheseltine, Commented May 5, 2020 at 10:34

chrisheseltine · Accepted Answer · 2020-05-05 10:40:58Z

0

I figured it out:

function flattenTags($t) {
  return ($t['name']);
}
$tags = $Fan->getTags()->all();
$flat_tags = array_map('self::flattenTags', $tags);
$string_tags = join(', ', $flat_tags);

The missing part was the all() command which converts a query into an array.

answered May 5, 2020 at 10:40

chrisheseltine

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