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phparraysobjectarray-column

PHP - Extracting a column of properties from an array of objects

I've got an array of cats objects:

$cats = Array
    (
        [0] => stdClass Object
            (
                [id] => 15
            ),
        [1] => stdClass Object
            (
                [id] => 18
            ),
        [2] => stdClass Object
            (
                [id] => 23
            )
)

and I want to extract an array of cats' IDs in 1 line (not a function nor a loop).

I was thinking about using array_walk with create_function but I don't know how to do it.

Any idea?

Solution

  • If you have PHP 7.0 or later, the best way is to use the built in function array_column() to access a column of properties from an array of objects:

    $idCats = array_column($cats, 'id');

    But the son has to be an array or converted to an array