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run code in 300+ PHP versions simultaneously
<?php $a = array ('zero','one','two', 'three'); foreach ($a as &$v) { echo $v.PHP_EOL; } echo $v.PHP_EOL; print_r($a); foreach ($a as $v) { echo $v.PHP_EOL; }

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52.8 ms | 402 KiB | 5 Q