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run code in 150+ php & hhvm versions
Bugs & Features
<?php define('foo', 5); define('foo', 6); var_dump(foo);
Output for 4.3.0 - 4.3.6, 4.3.9 - 4.4.9, 5.0.1 - 7.1.0
Notice: Constant foo already defined in /in/Dn2DV on line 4 int(5)
Output for 4.3.7 - 4.3.8, 5.0.0
Notice: Constant already defined in /in/Dn2DV on line 4 int(5)