Howto find out perl version
Q. How do I find out Perl version by running a cgi script from a webbrowser? How do I find out perl version from a command prompt under Windows or Linux / UNIX operating systems?
A. Perl is acronym for Practical Extraction and Report Language. It is a general-purpose programming language invented in 1987 by Larry Wall. Originally developed for text manipulation. Perl has become extremely popular and is now used for a wide range of tasks, including web development and interface design.
Find perl version from a shell prompt
If you have access to a shell prompt (UNIX/Linux) type following command to find out perl version:
$ perl -v
You can also type above command under Windows / Mac OS X by opening terminal.
Find perl version using a cgi script
If your web hosting server provider don't provide access to a shell, use following perl program to find out perl version:
Short version that avoid starting a new process (see below in comments):
#!/usr/bin/perl $command= $]; $title = "Perl Version"; print "Content-type: text/html\n\n"; print "<html><head><title>$title</title></head><body>"; print " <h1>$title</h1> \n"; print "Perl version : ".$command;
source code - version.pl (download link)
The following code provides a little bit more information:
#!/usr/bin/perl $command=`perl -v`; $title = "Perl Version"; print "Content-type: text/html\\n\\n"; print "<html><head><title>$title</title></head><body>"; print " <h1>$title</h1> \n"; print $command; print "</body></html>";
Upload script to your cgi-bin directory and execute script by typing url http://mydomain.com/cgi-bin/version.pl
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Discussion on This FAQ
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March 17th, 2008 at 12:42 pm
It is overkill to run a whole new process to find out the version, just read about Perl’s builtin variables in PERLVAR
In the code above change
$command=`perl -v`;
to
$command= $]