Is there a way to tell if website is built with perl from source or anything -

I'm just thinking, there's a way through which I can find out that the website is using Perl as That's what I have said that he can tell with Wordpress or php created with uses.

You can not ask a web site that has been implemented in the language. There is no rule that says ".php" URLs must run PHP (although this is probably the case), all of which has been fixed on the server side. There is no guarantee that a site that is "powered by Wordpress" is actually using Wordpress. Generally, it is a bad protection to provide information about your implementation details, because an attacker uses it to launch a known attack. Can choose to choose.

However, there are several ways to guess.

Does it end in ".pl" to see the URL in an easy way to tell one? Its probably Pearl (or you're looking at a Polish domain)

If you look at the feedback header, sometimes the web server will obviously recognize the use of the Perl. For example, to request the server you curl-i < / Code> and you can see the "server" and "x-power-by" headers.

  $ curl-I http://perldancer.org HTTP / 1.1 200 Date: Wed, 27 Mar 2013 05:04:14 GMT Content-Type: Text / html; Perl Dancer 1.311 Content-Length: 1984 by X-Power: Pearl Dancer 1.311   
 Although still using Perl, "server" and "x-power-bye" "Fields are completely informative and used to collect statistics. Actually this is bragging. The server is not required to say reality. Actually,.  
 If the web page detects what technology it is using, for example it is run by the executable type, you can see and see what it is .  
 Sometimes you can get hints, sometimes with small details in HTML and other content, they clearly tell in comments that what is used to produce HTML sometimes You can definitely guess based on the field. Sometimes you can tell by the cookie names and values. Sometimes you can tell how it creates JSON, XML, YAML or RSS output. Sometimes the software that creates itself identifies the image and the PDF header.  
 There are devices that will guess the operating system based on very small details of the implementation of its networking protocol, but I do not know  
 and, as Colin has suggested , You can try to take out an error message from the server.  
 But you can never really know it is the beauty of the web as a universal communication protocol, it does not matter what it's written in it.