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run code in 150+ php & hhvm versions
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<?php define('ABC',8); $a='ABC'; $b='a'; echo AB.C;
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Notice: Use of undefined constant AB - assumed 'AB' in /in/eJNqn on line 8 Notice: Use of undefined constant C - assumed 'C' in /in/eJNqn on line 8 ABC