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<?php $arr = [ 'id' => 1, 'field' => 2, ]; var_dump(array_diff_key(['id'],$arr));
Output for 7.3.24 - 7.3.33, 7.4.12 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
array(1) { [0]=> string(2) "id" }

preferences:
117.42 ms | 402 KiB | 114 Q