Alternative PHP Cache (APC)

http://sourceforge.net/projects/turck-mmcache/

Turck MMCache is a PHP Accelerator & Encoder. It increases performance of PHP scripts by caching them in compiled state, so that the overhead of compiling is almost completely eliminated. Also it uses some optimizations for speed up of scripts execution.

Win & Linux. Binaries from 2003. Seems not to support PHP Version > 4.3 :(

Quelle¹⁾

The PHP language was originally implemented using a PHP interpreter. Several compilers now exist, which decouple the PHP language from the interpreter:

• Roadsend PHP - achieves native compilation by compiling to bigloo scheme, which in turn is compiled to C, then to machine code
• phc - a C++ based compiler for PHP, using the Zend run-time for maximum compatibility
• Raven - a rewrite of Roadsend PHP (rphp), based on LLVM and a new C++ runtime
• Phalanger - compiles source code written in the PHP scripting language into CIL byte-code
• Caucho Resin/Quercus - compiles PHP to Java bytecode
• HipHop - developed at Facebook and now available as open source, transforms the PHP Script into C++, then compiles it.
• php-to-scala - converts PHP to human-readable Scala source code, which the developer can compile to Java bytecode

Advantages of compilation include not only better execution speed, but also obfuscation, static analysis, and improved interoperability with code written in other languages.

(Commercial)

The #1 http://shop.zend.com/de/zend-guard.html (600$/Year)

(Commercial)

http://www.ioncube.com/sa_encoder.php (>=199$)

http://www.intricks.com/projects/PhpCodeBuster

PhpCodeBuster, a freely available and open source PHP class to protect your PHP code. Using PhpCodeBuster, your PHP scripts will get obfuscated, meaning that the code is changed in such a way that it is very hard te reverse engineer it into a understandable format.

http://www.seocompany.ca/software/free-encryption-software.html