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run code in 150+ php & hhvm versions
Bugs & Features
<?php $first_number = 10; $first_number += 2; echo first_number; ?>
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 first_number - assumed 'first_number' in /in/Y0Itf on line 5 first_number