<?php

function & () {
	$a = true;
	return $a;
};

function &foo() {
	$a = true;
	return $a;
}

function ($no, & $a) {

};

function boo($no, &   $a) {

}

$b = false;
function () use (& $b) {

};

$c = &$b;
$d = [
	& $b,
	1 => &$c,
	&   $b,
];

foreach ([] as & $e) {
}
