Just install this on your hosted server for it to return the current version of Perl that is installed on the host. After the --- of course.
--------------------------
#!/usr/bin/perl
$command='perl -v';
$title = "Perl Version";
print "Content-type: text/html\n\n";
print "$title\n";
print "$title
\n";
print "";
print (exec $command);
print "\n";