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<?php function &generator(array &$array) { foreach($array as $key => &$value) { yield $key => $value; } } $array = range(1, 10); foreach(generator($array) as &$value) { $value++; } var_dump($array);
Output for git.master, git.master_jit, rfc.property-hooks
array(10) { [0]=> int(2) [1]=> int(3) [2]=> int(4) [3]=> int(5) [4]=> int(6) [5]=> int(7) [6]=> int(8) [7]=> int(9) [8]=> int(10) [9]=> &int(11) }

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