jQuery Youtube URL 验证与正则表达式 [英] jQuery Youtube URL Validation with regex

问题描述

我知道这里有很多问题的答案https://stackoverflow.com/questions/tagged/youtube+regex，但找不到与我相似的问题.

I know there is plenty of question answered over here https://stackoverflow.com/questions/tagged/youtube+regex, but not able find a question similar to me.

任何正文都有用于验证下面列出的 YouTube 视频 URL 行的 JavaScript 正则表达式.只想知道哪里可以有这样的网址

Any body has the JavaScript Regular expression for validating the YouTube VIDEO URL's line below listed. Just want to know where such a URL can be possible

http://www.youtube.com/watch?v=bQVoAWSP7k4
http://www.youtube.com/watch?v=bQVoAWSP7k4&feature=popular
http://www.youtube.com/watch?v=McNqjYiFmyQ&feature=related&bhablah
http://youtube.com/watch?v=bQVoAWSP7k4

-- 更新 1---- 更新 2--

-- update 1-- -- update 2--

这个几乎可以正常工作，但对于 URL http://youtube.com/watch?v 失败了=bQVoAWSP7k4

This one worked almost fine, but failed for the URL http://youtube.com/watch?v=bQVoAWSP7k4

var matches = $('#videoUrl').val().match(/http://(?:www.)?youtube.*watch?v=([a-zA-Z0-9-_]+)/);
if (matches) {
    alert('valid');
} else {
    alert('Invalid');
}

推荐答案

^http://(?:www.)?youtube.com/watch?v=w+(&S*)?$

//if v can be anywhere in the query list

^http://(?:www.)?youtube.com/watch?(?=.*v=w+)(?:S+)?$

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