This function is
EXPERIMENTAL. The behaviour of this function, the
name of this function, and anything else documented about this
function may change without notice in a future release of PHP.
Use this function at your own risk.
This reads the bytecodes from PHP for an existing function, and writes
them to the open file handle. Order is not important, (eg. if function b
uses function a, and you compile it like the example below, it will
work perfectly OK).