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run code in 200+ 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 - 7.1.7
TRUETRUE