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<?php $numbers = [1, 2, 3, 4, 5]; function x(array $numbers) { $result = array(); $previous_value = 0; foreach($numbers as $number) { $result[] = $previous_value + $number; $previous_value = $number; } return $result; } var_dump(x($numbers));
Output for git.master, git.master_jit, rfc.property-hooks
array(5) { [0]=> int(1) [1]=> int(3) [2]=> int(5) [3]=> int(7) [4]=> int(9) }

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