如何开始在C ++中编写PHP5扩展 [英] How to start writing a PHP5 extension in C++

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问题描述

我正在写一个PHP5扩展,虽然我可以用C语言编写,但使用C ++并利用STL和Boost更容易。



麻烦的是,我看到的教程只处理C,我正在寻找一个使用C ++的基本示例



这是我到目前为止所尝试的:



config.m4



  [--enable-hello启用Hello World支持])

如果测试$ PHP_HELLO=yes ;然后
AC_DEFINE(H​​AVE_HELLO,1,[是否有Hello World])
PHP_NEW_EXTENSION(hello,hello.cpp,$ ext_shared)
fi



php_hello.h



注意我试图声明PHP接口为extern C

  #ifndef PHP_HELLO_H 
#define PHP_HELLO_H 1


extern C{

#define PHP_HELLO_WORLD_VERSION1.0
#define PHP_HELLO_WORLD_EXTNAMEhello

PHP_FUNCTION(hello_world);

extern zend_module_entry hello_module_entry;
#define phpext_hello_ptr& hello_module_entry

}
#endif


$ b b

hello.cpp



  #ifdef HAVE_CONFIG_H 
#includeconfig.h
endif

#includephp.h
#includephp_hello.h

static function_entry hello_functions [] = {
PHP_FE(hello_world, NULL)

{NULL,NULL,NULL}
};

zend_module_entry hello_module_entry = {
#if ZEND_MODULE_API_NO> = 20010901
STANDARD_MODULE_HEADER,
#endif
PHP_HELLO_WORLD_EXTNAME,
hello_functions,
NULL,
NULL,
NULL,
NULL,
NULL,
#if ZEND_MODULE_API_NO> = 20010901
PHP_HELLO_WORLD_VERSION,
#endif
STANDARD_MODULE_PROPERTIES
};

#ifdef COMPILE_DL_HELLO
ZEND_GET_MODULE(hello)
#endif

PHP_FUNCTION(hello_world)
{
RETURN_STRING世界,1);
}



....这里是我的构建错误:



如果我phpize,配置和使这个,我得到以下(重新格式化为了清晰)

  $ make 
/ bin / bash /home/paul/php5/php-5.2.8/ext/hello2/libtool
--mode = compile
-I。
-I / home / paul / php5 / php-5.2.8 / ext / hello2 -DPHP_ATOM_INC
-I / home / paul / php5 / php-5.2.8 / ext / hello2 / include
-I / home / paul / php5 / php-5.2.8 / ext / hello2 / main
-I / home / paul / php5 / php-5.2.8 / ext / hello2
-I / usr / local / include / php
-I / usr / local / include / php / main
-I / usr / local / include / php / TSRM
-I / usr / local / include / php / Zend
-I / usr / local / include / php / ext
-I / usr / local / include / php / ext / date / lib
-DHAVE_CONFIG_H
-c /home/paul/php5/php-5.2.8/ext/hello2/hello.cpp
-o hello.lo
libtool:compile:unrecognized option`-I。'
libtool:compile:试试`libtool --help'获取更多信息。
make:*** [hello.lo]错误1

我怀疑我需要更多工作做到config.m4为了创建一个工作的makefile,但我是新的GCC工具链。



如果它有帮助,我只针对php 5.2.6+,只有在Linux(具体来说,Ubuntu 8.04)。我的构建环境是使用Ubuntu 8.10,使用gcc 4.3.2



指针非常感谢!

解决方案

发布后,我遇到了 CodeGen_PECL ,它从基于XML的描述中创建了一个框架扩展扩展。这包括一个标签使它输出C ++



除了确保头文件使用externC,生成的cpp文件还确保ZEND_GET_MODULE(hello)一个externC块。



如预期,最大的区别是在m4文件,它看起来像这样:

  dnl 
dnl $ Id:$
dnl

PHP_ARG_ENABLE(hello,是否启用hello函数,
[--enable-hello启用hello支持])

如果测试$ PHP_HELLO!=no;然后
PHP_REQUIRE_CXX
AC_LANG_CPLUSPLUS
PHP_ADD_LIBRARY(stdc ++ ,, HELLO_SHARED_LIBADD)
export OLD_CPPFLAGS =$ CPPFLAGS
export CPPFLAGS =$ CPPFLAGS $ INCLUDES -DHAVE_HELLO

AC_MSG_CHECKING(PHP版本)
AC_TRY_COMPILE([#include< php_version.h>],[
#if PHP_VERSION_ID< 40000
#错误此扩展功能至少需要PHP version 4.0.0
#endif
],
[AC_MSG_RESULT(ok)],
[AC_MSG_ERROR(至少需要PHP 4.0.0])])

export CPPFLAGS =$ OLD_CPPFLAGS


PHP_SUBST(HELLO_SHARED_LIBADD)
AC_DEFINE(H​​AVE_HELLO,1,[])

PHP_NEW_EXTENSION (hello,hello.cpp,$ ext_shared)

fi

如果您遇到同样的问题,请使用 CodeGen_PECL ,或调整上面的m4示例(以及确保您已在标题中和ZEND_GET_MODULE宏周围使用externC)


I'm writing a PHP5 extension, and while I could write it in C, it would be easier to use C++ and take advantage of the STL and Boost.

Trouble is, the tutorials I've seen only deal with C, and I'm looking for a basic example which uses C++

Here's what I've tried so far:

config.m4

[ --enable-hello   Enable Hello World support])

if test "$PHP_HELLO" = "yes"; then
  AC_DEFINE(HAVE_HELLO, 1, [Whether you have Hello World])
  PHP_NEW_EXTENSION(hello, hello.cpp, $ext_shared)
fi

php_hello.h

Note my attempt to declare the bits that PHP interfaces with as extern "C"

#ifndef PHP_HELLO_H
#define PHP_HELLO_H 1


extern "C" {

#define PHP_HELLO_WORLD_VERSION "1.0"
#define PHP_HELLO_WORLD_EXTNAME "hello"

PHP_FUNCTION(hello_world);

extern zend_module_entry hello_module_entry;
#define phpext_hello_ptr &hello_module_entry

}
#endif

hello.cpp

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "php.h"
#include "php_hello.h"

static function_entry hello_functions[] = {
    PHP_FE(hello_world, NULL)

    {NULL, NULL, NULL}
};

zend_module_entry hello_module_entry = {
#if ZEND_MODULE_API_NO >= 20010901
    STANDARD_MODULE_HEADER,
#endif
    PHP_HELLO_WORLD_EXTNAME,
    hello_functions,
    NULL,
    NULL,
    NULL,
    NULL,
    NULL,
#if ZEND_MODULE_API_NO >= 20010901
    PHP_HELLO_WORLD_VERSION,
#endif
    STANDARD_MODULE_PROPERTIES
};

#ifdef COMPILE_DL_HELLO
ZEND_GET_MODULE(hello)
#endif

PHP_FUNCTION(hello_world)
{
    RETURN_STRING("Hello World", 1);
}

....and here are my build errors:

If I phpize, configure and make this, I get the following (reformatted for clarity)

$ make
/bin/bash /home/paul/php5/php-5.2.8/ext/hello2/libtool 
   --mode=compile  
   -I. 
   -I/home/paul/php5/php-5.2.8/ext/hello2 -DPHP_ATOM_INC 
   -I/home/paul/php5/php-5.2.8/ext/hello2/include 
   -I/home/paul/php5/php-5.2.8/ext/hello2/main 
   -I/home/paul/php5/php-5.2.8/ext/hello2 
   -I/usr/local/include/php 
   -I/usr/local/include/php/main 
   -I/usr/local/include/php/TSRM 
   -I/usr/local/include/php/Zend 
   -I/usr/local/include/php/ext 
   -I/usr/local/include/php/ext/date/lib  
   -DHAVE_CONFIG_H     
   -c /home/paul/php5/php-5.2.8/ext/hello2/hello.cpp 
   -o hello.lo 
libtool: compile: unrecognized option `-I.'
libtool: compile: Try `libtool --help' for more information.
make: *** [hello.lo] Error 1

I suspect I need more work doing to the config.m4 in order to create a working makefile but I'm pretty new to the GCC toolchain.

If it helps, I'm only targetting php 5.2.6+, and only on Linux (specifically, Ubuntu 8.04). My build environment is using Ubuntu 8.10, using gcc 4.3.2

Pointers gratefully received!

解决方案

After posting I came across CodeGen_PECL which creates a skeleton extension from an XML based description of the extension. This includes a tag make it output C++

As well as making sure the header file used extern "C", the generated cpp file also ensured the ZEND_GET_MODULE(hello) was inside an extern "C" block also.

As expected, the biggest difference was in the m4 file, which looked like this:

dnl
dnl $ Id: $
dnl

PHP_ARG_ENABLE(hello, whether to enable hello functions,
[  --enable-hello         Enable hello support])

if test "$PHP_HELLO" != "no"; then
  PHP_REQUIRE_CXX
  AC_LANG_CPLUSPLUS
  PHP_ADD_LIBRARY(stdc++,,HELLO_SHARED_LIBADD)
  export OLD_CPPFLAGS="$CPPFLAGS"
  export CPPFLAGS="$CPPFLAGS $INCLUDES -DHAVE_HELLO"

  AC_MSG_CHECKING(PHP version)
  AC_TRY_COMPILE([#include <php_version.h>], [
#if PHP_VERSION_ID < 40000
#error  this extension requires at least PHP version 4.0.0
#endif
],
[AC_MSG_RESULT(ok)],
[AC_MSG_ERROR([need at least PHP 4.0.0])])

  export CPPFLAGS="$OLD_CPPFLAGS"


  PHP_SUBST(HELLO_SHARED_LIBADD)
  AC_DEFINE(HAVE_HELLO, 1, [ ])

  PHP_NEW_EXTENSION(hello, hello.cpp , $ext_shared)

fi

So, if you're struggling with the same problem, use CodeGen_PECL, or adapt the m4 sample above (as well as making sure you've used extern "C" in your header and around the ZEND_GET_MODULE macro)

这篇关于如何开始在C ++中编写PHP5扩展的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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