3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $search_array = array('first' => null, 'second' => 4); // returns false echo "1: ".(isset($search_array['first']))?'TRUE':'FALSE'; // returns true echo '2: '.(array_key_exists('first', $search_array))?'TRUE':'FALSE'; ?>
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
TRUETRUE