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run code in 300+ PHP versions simultaneously
<?php $a = [ 'a' => 1, 2 => 1, 'three' => 3, 4 => 5, 6 => 7, ]; foreach ($a as &$v) $v++; var_dump($a);
Output for git.master, git.master_jit, rfc.property-hooks
array(5) { ["a"]=> int(2) [2]=> int(2) ["three"]=> int(4) [4]=> int(6) [6]=> &int(8) }

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