php $_SERVER['HTTP_REFERER']详解

php $_SERVER['HTTP_REFERER']详解

ceshia.php

<pre>

echo '<a href="ceshib.php">ceshib</a>';

</pre>

ceshib.php

<pre>

print_r($_SERVER['HTTP_REFERER']);

exit();

</pre>

访问ceshia 然后点击ceshib连接

返回http://wx.newmiracle.cn/ceshia.php

如果直接访问ceshib

就会报错

Notice: Undefined index: HTTP_REFERER in F:\phpStudy\WWW\mircoweb\mircoweb\wwwroot\Public\ceshib.php on line 8