Home Backend Development PHP Tutorial Notice: Undefined index: HTTP_REFERER in,该如何解决

Notice: Undefined index: HTTP_REFERER in,该如何解决

Jun 13, 2016 pm 12:24 PM
http nbsp referer server undefined

Notice: Undefined index: HTTP_REFERER in
Notice: Undefined index: HTTP_REFERER in
无法登录网站后台,出现这个提示,以前可以登录的,请教这是怎么回事?
------解决思路----------------------
改为
define('PREV_URL', isset($_SERVER["HTTP_REFERER"]) ? $_SERVER["HTTP_REFERER"] : ''); //上一页地址

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