Einführung

Bcompiler was written for several reasons:

To encode entire script in a proprietary PHP application

To encode some classes and/or functions in a proprietary PHP application

To enable the production of php-gtk applications that could be used on client desktops, without the need for a php.exe.

To do the feasibility study for a PHP to C converter

The first of these goals is achieved using the bcompiler_write_header(), bcompiler_write_file() and bcompiler_write_footer() functions. The bytecode files can be written as either uncompressed or plain. To use the generated bytecode, you can simply include it with include or require statements.

The second of these goals is achieved using the bcompiler_write_header(), bcompiler_write_class(), bcompiler_write_footer(), bcompiler_read(), and bcompiler_load() functions. The bytecode files can be written as either uncompressed or plain. The bcompiler_load() reads a bzip compressed bytecode file, which tends to be 1/3 of the size of the original file.

To create EXE type files, bcompiler has to be used with a modified sapi file or a version of PHP which has been compiled as a shared library. In this scenario, bcompiler reads the compressed bytecode from the end of the exe file.

bcompiler can improve performance by about 30% when used with uncompressed bytecodes only. But keep in mind that uncompressed bytecode can be up to 5 times larger than the original source code. Using bytecode compression can save your space, but decompression requires much more time than parsing a source. bcompiler also does not do any bytecode optimization, this could be added in the future...

In terms of code protection, it is safe to say that it would be impossible to recreate the exact source code that it was built from, and without the accompanying source code comments. It would effectively be useless to use the bcompiler bytecodes to recreate and modify a class. However it is possible to retrieve data from a bcompiled bytecode file - so don't put your private passwords or anything in it.

Installation

short installation note:

Contact Information

If you have comments, bugfixes, enhancements or want to help developing this beast, you can drop me a mail at » alan_k@php.net. Any help is very welcome.

Inhaltsverzeichnis

bcompiler_load_exe — Reads and creates classes from a bcompiler exe file

bcompiler_load — Reads and creates classes from a bz compressed file

bcompiler_parse_class — Reads the bytecodes of a class and calls back to a user function

bcompiler_read — Reads and creates classes from a filehandle

bcompiler_write_class — Writes an defined class as bytecodes

bcompiler_write_constant — Writes a defined constant as bytecodes

bcompiler_write_exe_footer — Writes the start pos, and sig to the end of a exe type file

bcompiler_write_file — Writes a php source file as bytecodes

bcompiler_write_footer — Writes the single character \x00 to indicate End of compiled data

bcompiler_write_function — Writes an defined function as bytecodes

bcompiler_write_functions_from_file — Writes all functions defined in a file as bytecodes

bcompiler_write_header — Writes the bcompiler header