3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array1 = array(2,5,7,1); $array2 = array(1,3,2,5); foreach ($array1 as $i => &$v) { $v += $array2[$i]; } var_export($array1);

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25.56 ms | 404 KiB | 5 Q