PHP sort return values

$fruits = array("lemon", "orange", "banana", "apple");
print_r(chain_user_func('sort', $fruits));

function chain_user_func() {
$args = func_get_args();
$func = array_shift($args);
$args[0] = &$args[0];
call_user_func_array($func, $args);
return $args[0];
}

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