PyHP is an (incomplete!) implementation of the PHP language using the RPython technology. It uses JIT transformer provided by the RPython library to achieve good performance.

PyHP stands for Python + PHP, as RRpython is a subset of the Python language.

Highly unstable and work in progress.

HippyVM is too built on top of RPython, and is a complete, working implementation.

• all variable types like int, float, string, array, iterator
• if, while, for, foreach statements
• functions
• pass by value or by reference to a function
• global variables in function blocks using global
• global constants using define()
• (incomplete) standard library functions

• main.py - main entry point
• sourceparcer.py - parses a given PHP file using the grammar.txt definition, and produces an AST tree consisting of operations.py nodes
• bytecode.py - turns the AST tree produced by sourceparcer.py into bytecode by calling compile() on the tree. Produces a ByteCode instance consisting of opcodes.py nodes
• frame.py - execution frame. Contains the stack and the variables/functions map for the function or the global program. A frame instance is passed to execute method of a ByteCode instance as the only parameter
• grammar.txt - EBNF PHP grammar used by sourceparcer.py

Additional files:

• operations.py - AST tree nodes
• opcodes.py - class per each opcode. Each opcode has a eval(frame) method which gets called by the Bytecode.execute() method
• symbols.py - contains an optimized Map class used for symbols map in scopes.py
• stdlib.py - various PHP standard library methods like strlen
• functions.py - wraps a ByteCode instance or a native function from stdlib.py into an object which then gets used to run a function or the main program
• datatypes.py - all datatypes' box classes used to store the variables, like int, float, array, etc.

vagrant up
vagrant ssh
cd /var/www/pyhp

rpython -Ojit targetpyhp.py

Emit the -Ojit to compile an interpreter without JIT support. Speeds up the build process by 5x, but the produced interpreter runs much slower.

./pyhp-c fibonacci.php

PYPYLOG=jit-log-opt:jit.txt ./pyhp-c fibonacci.php

Plot the trace as a graph

PYTHONPATH=$PYTHONPATH:/home/vagrant/pypy-src/ python ~/pypy-src/rpython/tool/logparser.py draw-time jit.txt --mainwidth=8000 filename.png

PYTHONPATH=$PYTHONPATH:/home/vagrant/pypy-src/ py.test tests

JavaScript on top of RPython

Example interpreter

Pascal on top of RPython

HippyVM - php on top of RPython