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run code in 200+ php & hhvm versions
Bugs & Features
<?php function wer($x) { echo $x; } $e = 'ert'; call_user_func('wer', [&$e]);
based on GWWuh
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.3.0rc3
Notice: Array to string conversion in /in/isCLe on line 3 Array