1. 18/12/2010
Speed up ZingMe-NTVV2 with
PHP extension module
By Nguyen Trung Thanh
ZingMe Team leader
Web Technical - VNG

2. Contents
Introduction
Why?
PHP extension basic
SWIG
Sample

3. INTRODUCTION - ntvv2

4. Introduction
• Ntvv2 (http://me.zing.vn/apps/ntvv2)
– 1.M daily active user
– Average 800 rps (per webserver) max 1100
rps
– 9300 rps (all database servers)
– 3 webservers
• Use Membase for cache and storage
• Use other db for secondary storage
• All bussiness function is moved to PHP
extension

5. Why to write PHP module?
Make complicated Bussiness functions run
faster, consume less memory
PHP high-level overhead cpu/mem
Advance facility with PHP-FPM
Cache something in PHP process
Strictly Confidential – Do Not Distribute

6. PHP extension basic
What is an extension?
Lifecycle
Setting up a build environment
http://devzone.zend.com/article/4486
http://devzone.zend.com/article/1021-Extension-Writing-Part-I-
Introduction-to-PHP-and-Zend

7. What is an extension?
Have you ever used PHP extension?
PHP consist of many extensions
All function we used is from extensions

8. Lifecycle

9. Setting up build environment
- Setup PHP-devel
- Sample extension

10. Is it complicated?
●
Is there any sexier and easier way?
●
We can use SWIG

11. SWIG
SWIG is an interface compiler that connects
programs written in C and C++ with
scripting languages such as PHP, Python,
Ruby...
How SWIG works
Using SWIG
Install module to PHP extensions
Sample
Strictly Confidential – Do Not Distribute

12. How SWIG works

13. What does SWIG do for you ?
Namespace
Constants
Type conversion
For simple types (int, float, char *, enum)
Wraps complex types
Pointers to structs and classes
Exposes functions

14. Using SWIG
Defile module in swig file
Generate source code
Create module project, build it

15. Define module
Data type
Wrapper class/functions
%module ntvv2module
%{
#include <string>
#include <vector>
#include <list>
#include <string>
#include “ntvvgame.h"
%}
struct LandInfo{
int id;
std::string data;
} ;
Strictly Confidential – Do Not Distribute LandInfo updateLandInfo(int uid, int landID);

16. Exposure
•Swig recognizes C/C++ declarations
'struct' or 'class'
functions
•Hiding elements
%ignore solver::noupdate;
%include “satsolver/solver.h”

17. Useful commands
•Renaming
%rename("to_s") asString();
%rename( "name=" ) set_name( const char *name );
%rename("empty?") empty();
•Aliasing
%alias get "[]";
•Constants
%constant int Script = C_CONSTANT;
•Defines
%define YUILogComponent "bindings"
%enddef
%define %macro(PARAMETER)

18. SWIG steps
Generate code
Create project, compiling
– Add genterated code to project
Running
– Add extension module to PHP

19. Sample
Cache data in PHP module
Strictly Confidential – Do Not Distribute

20. Q&A