a标签跳转链接问题
我在wamp环境下写了一个php项目,其中有个<a href="www.douban.com"></a>
,并没有跳转到百度,而是在本页内跳转,加上http://www.douban.com就可以跳转到了,这是什么原因啊?
回复内容:
我在wamp环境下写了一个php项目,其中有个<a href="www.douban.com"></a>
,并没有跳转到百度,而是在本页内跳转,加上http://www.douban.com就可以跳转到了,这是什么原因啊?
href的格式
-
xxx
相对路径跳转(前面没有/) 跳转到当前目录下的xxx, 如当前URL为xxx.com/aaa/bbb
,则跳转到xxx.com/aaa/xxx
-
/xxx
绝对路径跳转(最前面一条/) 跳转到跟目录的xxx,如当前URL为xxx.com/aaa/bbb
,则跳转到xxx.com/xxx
-
schema://host/uri
全路径跳转(协议://开头) 跳转到特定的url,host必须有,后面的/uri
可以为空
你的格式不符合全路径跳转的格式,默认就按照第一种处理了
补充一下评论里的情况
//host/uri
的方式(两条杠开头),相当于省略协议,采用同本页面相同的协议
楼上的基本上是对的,补充一点如果你不想写协议,可以在路径前写上//,如//www.douban.com 这个采用的是与你的网站相同的协议发送请求。

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