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<?php $inc = 2; $s=0; recv(5); function recv($v) { global $inc,$s; if ($v >= 1) { echo $inc * $v . " "; $v--; $s = $s + $inc * $v; recv($v); } } echo "The sum is $s"; ?>
Output for git.master, git.master_jit, rfc.property-hooks
10 8 6 4 2 The sum is 20

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