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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').PHP_EOL; // returns true echo '2: '.(array_key_exists('first', $search_array)?'TRUE':'FALSE').PHP_EOL; ?>
Output for 4.3.10 - 4.4.9, 5.0.2 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
1: FALSE 2: TRUE
Output for 4.3.0 - 4.3.9, 5.0.0 - 5.0.1
Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/Qs8eb on line 5 1: FALSEPHP_EOL Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/Qs8eb on line 8 2: TRUEPHP_EOL