| 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 | 
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