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run code in 150+ php & hhvm versions
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<?php $x = array (0 ,1); next($x); $y = $x; echo "a".current($x); next($x); $z = $x; echo "b".current($z); // * echo "c".current($x); ?>
Output for hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
a1bc
Output for 5.2.4 - 5.6.28
a1b0c
Output for 4.3.0 - 4.4.0, 4.4.2 - 5.2.3
a0b0c1
Output for 4.4.1
a1b1c1