Quote:
Originally Posted by NewsBlaze
Source code can look very similar.
Perl doesn't need a webserver to run
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The source code can look similar, but Perl is often a little more terse. Really tight Perl code looks a lot like line noise.

If its obfuscated it's nearly impossible to puzzle out. PHP can be that way but you really have to work at it.
Technically, neither of them need a web server to run. You can run either at the command line if your system has the right modules installed.