Is there a code obfuscator for PHP? [closed]

Answer 1

Obfuscation is only adding another layer of potential bugs and security vulnerabilities to your program. Please don't do it.

The kind of people who write obfuscation software usually seem very sketchy and non-skilled anyway.

If your code is "great", crackers will go through great lengths to spread it, regardless of whether or not it is obfuscated. If nobody knows/cares about your code, they probably won't, either.

Answer 2

I'm not sure you can label obfuscation of an interpreted language as pointless (I'm unable to add a comment to Schwern's post, so here goes a new entry).

I think it's a little shortsighted to assume you know all the possible scenarios where someone would like to obfuscate code, and you assume that anyone will actually be willing to go to whatever necessary lengths to view that code once obfuscated. Consider my current scenario:

I work for a consulting company that is developing a large and fairly sophisticated PHP-based site. The project will be hosted on a client's server that is hosting other sites developed by other consultancies. Technically any code we write is owned by the client, so we can't license it. However, any other consultancy (competitor) with access to the server can copy our code without getting permission from the client first. We therefore have a genuine reason for obfuscation - to make the effort required for a competitor to understand our code more than the effort of creating a copy of our work from scratch.

Answer 3

People will offer you obfuscators, but no amount of obfuscation can prevent someone from getting at your code. None. If your computer can run it, or in the case of movies and music if it can play it, the user can get at it. Even compiling it to machine code just makes the job a little more difficult. If you use an obfuscator, you are just fooling yourself. Worse, you're also disallowing your users from fixing bugs or making modifications.

Music and movie companies haven't quite come to terms with this yet, they still spend millions on DRM.

In interpreted languages like PHP and Perl it's trivial. Perl used to have lots of code obfuscators, then we realized you can trivially decompile them.

perl -MO=Deparse some_program

PHP has things like DeZender and Show My Code.

My advice? Write a license and get a lawyer. The only other option is to not give out the code and instead run a hosted service.

See also the perlfaq entry on the subject.

Answer 4

Nothing will be perfect. If you just want something to stop non-programmers then here's a little script I wrote you can use:

<?php
$infile=$_SERVER['argv'][1];
$outfile=$_SERVER['argv'][2];
if (!$infile || !$outfile) {
    die("Usage: php {$_SERVER['argv'][0]} <input file> <output file>\n");
}
echo "Processing $infile to $outfile\n";
$data="ob_end_clean();?>";
$data.=php_strip_whitespace($infile);
// compress data
$data=gzcompress($data,9);
// encode in base64
$data=base64_encode($data);
// generate output text
$out='<?ob_start();$a=\''.$data.'\';eval(gzuncompress(base64_decode($a)));$v=ob_get_contents();ob_end_clean();?>';
// write output text
file_put_contents($outfile,$out);

Answer 5

Thicket™ Obfuscator for PHP

The PHP Obfuscator tool scrambles PHP source code to make it very difficult to understand or reverse-engineer (example). This provides significant protection for source code intellectual property that must be hosted on a website or shipped to a customer. It is a member of SD's family of Source Code Obfuscators.

Answer 6

The best I've seen is Zend Guard.