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<?php $params = [1,2,3]; function transform(array $params) { $references = []; foreach ($params as $key => $value) { $references[$key] = &$params[$key]; } unset($value); $value = "foo"; return $references; return $references; } var_dump($params); $params = transform($params); var_dump($params); $hovno = 'prdel'; $prdel = &$hovno; var_dum($hovno); var_dump($prdel);

preferences:
52.27 ms | 402 KiB | 5 Q