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run code in 200+ php & hhvm versions
Bugs & Features
<?php foreach ($GLOBALS['dummy'] as $k => $v) $v[0]++; unset($v);
based on dIlB4
Output for 5.3.22 - 7.2.6
Notice: Undefined index: dummy in /in/W1TCI on line 3 Warning: Invalid argument supplied for foreach() in /in/W1TCI on line 3