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:phpStudyWWWmircowebmircowebwwwrootPublicceshib.php on line 8