This function is
EXPERIMENTAL. That means, that the behaviour of this
function, the function name, in concreto ANYTHING documented here can
change in a future release of this package WITHOUT NOTICE. Be warned, and
use this function at your own risk.
An EXE (or self executable) file consists of 3 parts,
The Executable code (eg. a compiled C program that can initiate call the php bcompiler)
The Bzip encoded Bytecodes
The bcompiler exe footer
The startpos is the position of in the file at which the Bzip encoded bytecodes start, and can be obtained using
ftell($fh),