<html>
<head>
<title>Reference as Function Arguments</title>
</head>
<body>
<?php
function ref_test(&$var)
{
$var = $var * 2;
}
$a = 10;
ref_test($a);
echo $a;
?>
</body>
</html>
$t2 = "5";
$result = $t1 + $t2;
echo " {$result} <br/>";
$t3 = "1a";
$result += $t3;
echo " {$result} <br/>";
#����
$t4 =& $t3;
printf("\$t3 :%d<br/>", $t3);
$t4 = "change";
printf("\$t3 :%d<br/>", $t3);
function ref_test(&$param)
{
$param = $param + 1;
}
ref_test($t1);
printf("function_ref t1 :%d<br/>", $t1);
#ȫ�ֱ����ں����е�ʹ��
function global_test()
{
global $t1;
//�������������ϣ�
$t1 += 1;
}
global_test($t1);
printf("global_change t1 :%d<br/>", $t1);
#��̬����
function static_test()
{
static $t1 = 0;
//�������������ϣ�
