| Title | Test
                    Find
                    
                    Validate Twitter Account Url | 
            
                | Expression | ^http[s]?://twitter\.com/(#!/)?[a-zA-Z0-9]{1,15}[/]?$ | 
            
                | Description | Allows http and https, bans www prefix, username portion is clamped to the rules it gives you at signup and also allows an optional trailing slash. [UPDATED] allows the #! notation that twitter used. | 
            
                | Matches | http://twitter.com/rtpharry/  |  http://twitter.com/rtpharry  |  https://twitter.com/rtpharry/  |  https://twitter.com/rtpharry  |  http://twitter.com/#!/rtpharry/ | 
            
                | Non-Matches | http://www.twitter.com/wwwprefix/  |  http://twitter.com/longerthan15characters/  |  http://twitter.com/illegal$chars/ | 
            
                | Author | Rating:
                        
Not yet rated.
                    Matthew Harris | 
            
                | Source |  | 
            
              | Your Rating |  |