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run code in 150+ php & hhvm versions
Bugs & Features
<?php class B {} $a = new stdClass; $b = new B; $b->a = 1; $item='null'; var_dump(array_key_exists($item, $a), array_key_exists('a', $a));
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
bool(false) bool(false)