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<?php $result=array('a'=>FALSE); $id='a'; var_dump($result); var_dump(!empty($result[$id]) && $result[$id]===FALSE);
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.34, 8.3.0 - 8.3.33, 8.4.1 - 8.4.26, 8.5.0 - 8.5.11
array(1) { ["a"]=> bool(false) } bool(false)
preferences:
33.55 ms | 1135 KiB | 8 Q