<HTML>
<HEAD>
<TITLE>第03.3讲：系统变量</TITLE>
</HEAD>
<BODY>
<?php
$value0 = "guest";
$$value0 = "customer";
echo $guest."<br />";
$guest = "feifei";
echo $guest."\t".$$value0."<br />";
$value1 = "xiaoming";
$value2 = &$value1;
echo $value1."\t".$value2."<br />";
$value2 = "lili";
echo $value1."\t".$value2;
?>
</BODY>
<HTML>
