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run code in 200+ php & hhvm versions
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<?php $arr = array(1,2,3,4,5); foreach($arr as $key => $row) { echo key($arr), '=>', current($arr), "\r\n"; }
Output for 7.0.0 - 7.2.0
0=>1 0=>1 0=>1 0=>1 0=>1
Output for 5.3.21 - 5.6.28
1=>2 1=>2 1=>2 1=>2 1=>2