使内部链接成为外部链接

Question

So,

1. web site have a user profile
2. user can edit own profile
3. profile data have "site" data field
4. user can enter some site url and after that this url will shown in profile like a link

if user enter site with protocol ( https://facebook.com ) there is no problem and it goes to https://facebook.com

but if user enter something like this facebook.com it will be internal link and goes to https://my.site.com/facebook.com

how can i avoid this situation?

Answer 1

Check if there is :// in the entered data. If not then add http://

Answer 2

除非您需要进行一些高级检查，否则只需在他们添加网址/网站时对其进行检查-如果“ site”值不是以http：//或https：//开头，则只需在添加前将其添加它。