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run code in 200+ php & hhvm versions
Bugs & Features
<?php define('Z', 'foo'); define('Z', 'bar'); echo Z;
based on QBula
Output for 4.3.0 - 4.3.6, 4.3.9 - 4.4.9, 5.0.1 - 7.2.0
Notice: Constant Z already defined in /in/MsngN on line 3 foo
Output for 4.3.7 - 4.3.8, 5.0.0
Notice: Constant already defined in /in/MsngN on line 3 foo