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<?php $var = '0'; if ($var == 0) { echo 'hit because zero'; } elseif (empty($var)) { echo 'hit because empty'; } else { echo 'hit because not zero and not empty'; }
Output for 5.2.15 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
hit because zero