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<?php $a = ['a']; function &set_a($value) { static $a = []; if (!in_array($value, $a, TRUE)) { $a[] = $value; } return $a; } $a = &set_a('a'); foreach ($a as &$value) { var_dump($value); set_a('b'); }
Output for git.master, git.master_jit, rfc.property-hooks
string(1) "a" string(1) "b"

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