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run code in 150+ php & hhvm versions
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<?php $x = array(1); next($x); $y = $x; var_dump(current($x)); var_dump(current($y)); ?>
Output for 4.4.1, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
bool(false) bool(false)
Output for 4.3.0 - 4.4.0, 4.4.2 - 5.6.28
int(1) bool(false)