<?php
/*
 * Returning values by reference. Only the statement marked (*) will actually
 * create a reference to $a (so, both the function and the assignment must be
 * is_ref).
 */

	function f()
	{
		return $GLOBALS["a"];	
	}
	
	function &g()
	{
		return $GLOBALS["a"];
	}

	$a = 5;
	$b = f();
	$b = $b + 1;
	var_export($a);
	var_export($b);

	$a = 5;
	$c = g();
	$c = $c + 1;
	var_export($a);
	var_export($c);

	$a = 5;
	$d =& f();
	$d = $d + 1;
	var_export($a);
	var_export($d);

	$a = 5;
	$e =& g(); // (*)
	$e = $e + 1;
	var_export($a);
	var_export($e);
?>