PHPCPP安装以及hello world

2017-01-09 14:17:08来源:oschina作者:纵使有花兼明月何堪无酒亦无人人点击

第七城市

学习了一段时间做PHP扩展开发,由于C的难度较大,内存回收,指针每一个都可以能让初学者望而却步,加上C开发效率太低,小型企业对于这种高大上的开发,还是少触碰为好。但是有时候PHP开发执行效率确实太低,而且存在很大的资源浪费,并且这个又是无法避免的(比如excel),混合开发让项目的迁移和可维护性都降低了。


一次偶然机会发现了PHPCPP,C++开发PHP的扩展,C++不用说了吧!执行效率最接近C的语言。最主要的是PHPCPP大大的降低了PHP扩展的开发难度。以前开发扩展,初始化项目对于小白来说都可能是个灾难,而PHPCPP对于希望开发扩展的PHPER可以说是一个福音。


在不接触PHP底层的情况下,采用PHPCPP是一个很好的选择方案。下面废话不多说,上干货。


首先选择一个你常用的linux版本,然后下载PHPCPP

git clone https://github.com/CopernicaMarketingSoftware/PHP-CPP.git

然后编译并安装PHPCPP

make &&sudomake install

这样PHPCPP就安装成功了。


从PHPCPP下载一个空项目http://www.php-cpp.com/EmptyExtension.zip


这里说明一下,默认最新PHPCPP是只支持PHP7的,如果需要支持PHP5.X需要下载他的另外一个版本,API一样,只是sdk不同,所以采用PHPCPP开发的扩展源码是相通的,只是需要在对应版本编译。


言归正传,空项目中的Makefile,可以修改NAME,这个是你的扩展文件名称,其他都保持不变


#
# Makefile template
#
# This is an example Makefile that can be used by anyone who is building
# his or her own PHP extensions using the PHP-CPP library.
#
# In the top part of this file we have included variables that can be
# altered to fit your configuration, near the bottom the instructions and
# dependencies for the compiler are defined. The deeper you get into this
# file, the less likely it is that you will have to change anything in it.
#
#
# Name of your extension
#
# This is the name of your extension. Based on this extension name, the
# name of the library file (name.so) and the name of the config file (name.ini)
# are automatically generated
#
NAME= yourextension
#
# Php.ini directories
#
# In the past, PHP used a single php.ini configuration file. Today, most
# PHP installations use a conf.d directory that holds a set of config files,
# one for each extension. Use this variable to specify this directory.
#
# In Ubuntu 14.04 Apache 2.4 is used, which uses the mods-available directory
# instead of a conf.d directory. In 16.04 the directory changed yet again.
# This has to be checked.
#
UBUNTU_MAJOR:= $(shell /usr/bin/lsb_release -r -s | cut -f1 -d.)
OVER_SIXTEEN:= $(shell echo "${UBUNTU_MAJOR} >= 16" | bc)
OVER_FOURTEEN := $(shell echo "${UBUNTU_MAJOR} >= 14" | bc)
ifeq (${OVER_SIXTEEN}, 1)
INI_DIR = /etc/php/7.0/mods-available/
else ifeq (${OVER_FOURTEEN}, 1)
INI_DIR = /etc/php5/mods-available/
else
INI_DIR = /etc/php5/conf.d/
endif
#
# The extension dirs
#
# This is normally a directory like /usr/lib/php5/20121221 (based on the
# PHP version that you use. We make use of the command line 'php-config'
# instruction to find out what the extension directory is, you can override
# this with a different fixed directory
#
EXTENSION_DIR= $(shell php-config --extension-dir)
#
# The name of the extension and the name of the .ini file
#
# These two variables are based on the name of the extension. We simply add
# a certain extension to them (.so or .ini)
#
EXTENSION= ${NAME}.so
INI = ${NAME}.ini
#
# Compiler
#
# By default, the GNU C++ compiler is used. If you want to use a different
# compiler, you can change that here. You can change this for both the
# compiler (the program that turns the c++ files into object files) and for
# the linker (the program that links all object files into the single .so
# library file. By default, g++ (the GNU C++ compiler) is used for both.
#
COMPILER = g++
LINKER= g++
#
# Compiler and linker flags
#
# This variable holds the flags that are passed to the compiler. By default,
# we include the -O2 flag. This flag tells the compiler to optimize the code,
# but it makes debugging more difficult. So if you're debugging your application,
# you probably want to remove this -O2 flag. At the same time, you can then
# add the -g flag to instruct the compiler to include debug information in
# the library (but this will make the final libphpcpp.so file much bigger, so
# you want to leave that flag out on production servers).
#
# If your extension depends on other libraries (and it does at least depend on
# one: the PHP-CPP library), you should update the LINKER_DEPENDENCIES variable
# with a list of all flags that should be passed to the linker.
#
COMPILER_FLAGS= -Wall -c -O2 -std=c++11 -fpic -o
LINKER_FLAGS = -shared
LINKER_DEPENDENCIES = -lphpcpp
#
# Command to remove files, copy files and create directories.
#
# I've never encountered a *nix environment in which these commands do not work.
# So you can probably leave this as it is
#
RM= rm -f
CP= cp -f
MKDIR = mkdir -p
#
# All source files are simply all *.cpp files found in the current directory
#
# A built-in Makefile macro is used to scan the current directory and find
# all source files. The object files are all compiled versions of the source
# file, with the .cpp extension being replaced by .o.
#
SOURCES= $(wildcard *.cpp)
OBJECTS= $(SOURCES:%.cpp=%.o)
#
# From here the build instructions start
#
all:${OBJECTS} ${EXTENSION}
${EXTENSION}:${OBJECTS}
${LINKER} ${LINKER_FLAGS} -o $@ ${OBJECTS} ${LINKER_DEPENDENCIES}
${OBJECTS}:
${COMPILER} ${COMPILER_FLAGS} $@ ${@:%.o=%.cpp}
install:
${CP} ${EXTENSION} ${EXTENSION_DIR}
${CP} ${INI} ${INI_DIR}
clean:
${RM} ${EXTENSION} ${OBJECTS}

main.c源码

#include
#include
void myFunction()
{
Php::out << "hello world" << std::endl;
}
extern "C" {
PHPCPP_EXPORT void *get_module() {
static Php::Extension extension("my_extension", "1.0");
extension.add("myFunction");
return extension;
}
}

这样一个扩展代码就完成了,执行编译

make

然后将生成的xxx.so拷贝到PHP扩展目录,并在PHP.INI加入


extension=yourextension.so

执行php -m查看是否加载了扩展,如果已经成功加载那么,就会显示my_extension在里面了


php-m

那么PHP中如何调用呢?如果没有使用命名空间那么可以这样


<?php
myFunction();

如果使用了需要加上/


<?php
/myFunction();

这样第一个扩展就完成了。

以后会每周至少更新两篇关于PHPCPP的文章记录并分享自己的使用PHPCPP的开发经验。

第七城市

最新文章

123

最新摄影

微信扫一扫

第七城市微信公众平台