javascript 使用正则表达式获取 url 变量
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Take a url variable with regex
提问by Patrique
I have the following url
我有以下网址
http://www.test.info/link/?url=http://www.site2.com
How do I get the value of the url parameter with regular expressions in javascript?
如何在javascript中使用正则表达式获取url参数的值？
Thanks
谢谢
回答by Andrew Mackrodt
function extractUrlValue(key, url)
{
if (typeof(url) === 'undefined')
url = window.location.href;
var match = url.match('[?&]' + key + '=([^&]+)');
return match ? match[1] : null;
}
If you're trying to match 'url' from a page the visitor is currently on you would use the method like this:
如果您尝试从访问者当前所在的页面匹配“url”，您可以使用如下方法：
var value = extractUrlValue('url');
Otherwise you can pass a custom url, e.g.
否则，您可以传递自定义网址，例如
var value = extractUrlValue('url', 'http://www.test.info/link/?url=http://www.site2.com
回答by Jordan
回答by amosrivera
Might want to check this: http://snipplr.com/view/799/get-url-variables/(works without regEx)
可能想检查一下：http: //snipplr.com/view/799/get-url-variables/（无需正则表达式即可工作）
This one does use regEx: http://www.netlobo.com/url_query_string_javascript.html
这个确实使用正则表达式：http: //www.netlobo.com/url_query_string_javascript.html
function gup( name )
{
name = name.replace(/[\[]/,"\\[").replace(/[\]]/,"\\]");
var regexS = "[\?&]"+name+"=([^&#]*)";
var regex = new RegExp( regexS );
var results = regex.exec( window.location.href );
if( results == null )
return "";
else
return results[1];
}
var param = gup( 'var' );
回答by Srdjan Pejic
Well, firstly, is that the whole query string? If so, all you need to do is split on the =:
那么，首先，这是整个查询字符串吗？如果是这样，您需要做的就是在 = 上拆分：
url.split('=')[1];
Otherwise, you might want to use Jordan's Regex.
否则，您可能想使用 Jordan 的 Regex。
回答by Vasyl Zubach
On the answer code:
在答案代码上：
function extractUrlValue(key, url)
{
if (typeof(url) === 'undefined')
url = window.location.href;
var match = url.match('[?&]' + key + '=([^&#]+)');
return match ? match[1] : null;
}
If keyis a last parameter in URL and after that there is an anchor - it enter code herewill return value#anchoras a value. #in regexp '[?&]' + key + '=([^&#]+)'will prevent that.
如果key是 URL 中的最后一个参数，然后有一个锚点 - 它在此处输入代码将value#anchor作为值返回。#在正则表达式中'[?&]' + key + '=([^&#]+)'会阻止这种情况。
