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run code in 150+ php & hhvm versions
Bugs & Features
<?php $array = ['foo' => null]; var_export($array); var_export(isset($array['foo'])); var_export(array_key_exists('foo', $array));
Output for 5.4.0 - 7.1.0
array ( 'foo' => NULL, )falsetrue
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/KqLLX on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/KqLLX on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/KqLLX on line 2
Process exited with code 255.