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Bugs & Features
<?php $test = 'call_user_func_array'; echo ${test}('strtoupper', array('test'));
based on aTKH6
Output for 7.2.0
Warning: Use of undefined constant test - assumed 'test' (this will throw an Error in a future version of PHP) in /in/dD8CE on line 3 TEST
Output for 5.3.19 - 7.1.10
Notice: Use of undefined constant test - assumed 'test' in /in/dD8CE on line 3 TEST