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<?php $array = [ 'id1' => ['primary_key' => '123', 'test' => 'test'], 'id2' => ['primary_key' => '123', 'test' => 'test'], 'id3' => ['primary_key' => '123', 'test' => 'test'] ]; var_dump(array_column($array, 'primary_key'));
Output for 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.15, 8.5.0
array(3) { [0]=> string(3) "123" [1]=> string(3) "123" [2]=> string(3) "123" }
preferences:
44.51 ms | 406 KiB | 5 Q