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run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array( 'a' => array( 'a' => 1, ), ); var_dump(isset($a['a']['a'])); var_dump(isset($a['a']['b'])); var_dump(isset($a['b']['a'])); var_dump(isset($a['b']['b']));
Output for 4.3.0 - 7.1.0
bool(true) bool(false) bool(false) bool(false)