How to automatically display URLs as page titles when posted elsewhere?

[Miyavi]

I've noticed that when I paste some URLs into forums, they automatically display the page title for that particular URL. Is that related to code, is it a forum feature, is it a browser feature?

For example, when I paste NamePros's URL in my post, I automatically get the following:
NamePros - Buy, Sell, Discover Domain Names

Thanks.

 

[djdeth]

It is a forum featured, and you can actually change it to whatever you want.

 

[Miyavi]

I know I can change it to whatever I want by using the forum's URL tags, but I don't understand why some URLs automatically show up as that URL's page title and some simply display the URL.

 

[premiumscripts]

Probably because the function only sets aside X seconds to retrieve the page title, if the URL is slower, it would just ignore it.

Anyway, they just retrieve the page and then do a regex on it like so:

preg_match('/<title>([^>]*)<\/title>/si', $contents, $match );

 

[Miyavi]

Ah, that makes sense. Thank you for the explanation. :tu: