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run code in 200+ php & hhvm versions
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<?php $test = array(); $test['eval_zero'] = 0; $test['eval_null'] = null; $test['eval_false'] = false; $test['eval_true'] = true; if (isset($test['eval_zero'])) { echo 'Zero is set.'; }
based on KUKZ4
Output for 4.3.0 - 7.2.0
Zero is set.