php - preg_replace href value only if there string x is not found in it
I have a problem with the following situation
I want to replace the href value with preg_replace and dont know how
I got 3 types of links
1:<a href="http://www.something.com"></a> 2:<a href="smartlink:webview-something"></a> 3:<a href="link/to/something"></a>
I want to add the domain on link 3 (http://www.something.com/link/to/something) but 1 and 2 should stay untouched.
How can i do that?