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run code in 200+ php & hhvm versions
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<?php $list = array("A", "B", "C","D"); print(current($list)); next($list); foreach ($list as $var) { print(current($list)); next($list); }
Output for 5.2.4 - 7.2.0
ABCD
Output for 4.3.0 - 4.4.0, 4.4.2 - 5.2.3
AABCD
Output for 4.4.1
ABBCD