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<?php function sum2Numbers($x1) { static $x2 = 0; echo "$x2 += $x1\n"; $x2 += $x1; echo "Returning $x2\n"; return $x2; } $sum = 10; for($m = 1; $m < 4; $m++){ echo "Sum 1 is $sum\n"; $sum += sum2Numbers($m); echo "Sum 2 is $sum\n"; } echo $sum;
Output for git.master, git.master_jit, rfc.property-hooks
Sum 1 is 10 0 += 1 Returning 1 Sum 2 is 11 Sum 1 is 11 1 += 2 Returning 3 Sum 2 is 14 Sum 1 is 14 3 += 3 Returning 6 Sum 2 is 20 20

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