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run code in 150+ php & hhvm versions
Bugs & Features
<?php $var = NULL; var_dump(isset($var)); var_dump(array_key_exists($GLOBALS['var']));
Output for 5.3.0 - 5.6.28, hhvm-3.10.0 - 3.13.2, 7.0.0 - 7.1.0
bool(false) Warning: array_key_exists() expects exactly 2 parameters, 1 given in /in/gHB2b on line 7 NULL
Output for 4.3.0 - 5.2.17
bool(false) Warning: Wrong parameter count for array_key_exists() in /in/gHB2b on line 7 NULL