What does this "$value[] = $args" design in php related to the array?

I can not find anything the Internet for information about this design:
$return[] = array('id' => $subArray['id']);
I would be grateful if you will inform)
April 7th 20 at 11:57
1 answer
April 7th 20 at 11:59
Solution
adds an array of right as a new array element on the left.
Thank you - Rose.Schumm commented on April 7th 20 at 12:02

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