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run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = array(); var_dump(isset($a['foo']['bar']['baz'])); var_dump(array_key_exists('baz', $a['foo']['bar']));
based on N23W2
Output for 5.3.0 - 7.2.0
bool(false) Notice: Undefined index: foo in /in/AqeMh on line 6 Warning: array_key_exists() expects parameter 2 to be array, null given in /in/AqeMh on line 6 NULL
Output for 4.3.2 - 5.2.17
bool(false) Notice: Undefined index: foo in /in/AqeMh on line 6 Warning: array_key_exists(): The second argument should be either an array or an object in /in/AqeMh on line 6 bool(false)
Output for 4.3.0 - 4.3.1
bool(false) Notice: Undefined index: foo in /in/AqeMh on line 6 Warning: array_key_exists() [http://www.php.net/function.array-key-exists]: The second argument should be either an array or an object in /in/AqeMh on line 6 bool(false)