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run code in 150+ php & hhvm versions
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<?php $a = array(); $a['styleid'] = 29; if(array_key_exists('styleid', $a)) { echo 'true'; } else { echo 'false'; } //echo $a['styleid']; ?>
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
true