PHP 真正多线程的使用

| |
[不指定 2013-12-17 11:17 | by 张宴 ]
  PHP 5.3 以上版本,使用pthreads PHP扩展,可以使PHP真正地支持多线程。多线程在处理重复性的循环任务,能够大大缩短程序执行时间。

  我之前的文章中说过,大多数网站的性能瓶颈不在PHP服务器上,因为它可以简单地通过横向增加服务器或CPU核数来轻松应对(对于各种云主机,增加VPS或CPU核数就更方便了,直接以备份镜像增加VPS,连操作系统、环境都不用安装配置),而是在于MySQL数据库。如果用 MySQL 数据库,一条联合查询的SQL,也许就可以处理完业务逻辑,但是,遇到大量并发请求,就歇菜了。如果用 NoSQL 数据库,也许需要十次查询,才能处理完同样地业务逻辑,但每次查询都比 MySQL 要快,十次循环NoSQL查询也许比一次MySQL联合查询更快,应对几万次/秒的查询完全没问题。如果加上PHP多线程,通过十个线程同时查询NoSQL,返回结果汇总输出,速度就要更快了。我们实际的APP产品中,调用一个通过用户喜好实时推荐商品的PHP接口,PHP需要对BigSea NoSQL数据库发起500~1000次查询,来实时算出用户的个性喜好商品数据,PHP多线程的作用非常明显。

  PHP扩展下载:https://github.com/krakjoe/pthreads
  PHP手册文档:http://php.net/manual/zh/book.pthreads.php

  1、扩展的编译安装(Linux),编辑参数 --enable-maintainer-zts 是必选项:
cd /Data/tgz/php-5.5.1
./configure --prefix=/Data/apps/php --with-config-file-path=/Data/apps/php/etc --with-mysql=/Data/apps/mysql --with-mysqli=/Data/apps/mysql/bin/mysql_config --with-iconv-dir --with-freetype-dir=/Data/apps/libs --with-jpeg-dir=/Data/apps/libs --with-png-dir=/Data/apps/libs --with-zlib --with-libxml-dir=/usr --enable-xml --disable-rpath --enable-bcmath --enable-shmop --enable-sysvsem --enable-inline-optimization --with-curl --enable-mbregex --enable-fpm --enable-mbstring --with-mcrypt=/Data/apps/libs --with-gd --enable-gd-native-ttf --with-openssl --with-mhash --enable-pcntl --enable-sockets --with-xmlrpc --enable-zip --enable-soap --enable-opcache --with-pdo-mysql --enable-maintainer-zts
make clean
make
make install        

unzip pthreads-master.zip
cd pthreads-master
/Data/apps/php/bin/phpize
./configure --with-php-config=/Data/apps/php/bin/php-config
make
make install


vi /Data/apps/php/etc/php.ini

添加:
extension = "pthreads.so"


  2、给出一段PHP多线程、与For循环,抓取百度搜索页面的PHP代码示例:





技术大类 » PHP/JS/Shell | 评论(145) | 引用(0) | 阅读(357680)
Jack
2020-7-7 14:53
I am happy to recommend this informative post with my college students who are taking essay writing help http://www.qualitydissertation.co.uk/essay-writing-help from me with error free work and minimum pass guarantee.
storiesig Email Homepage
2020-8-5 10:38
Greetings! Very useful advice in this particular article! It is the little changes that produce the biggest changes. Thanks a lot for sharing! Please check link storiesig
Nursing Healthcare Writing Services Email Homepage
2020-8-20 14:23
Nursing coursework writing service seekers have been on the rise lately since most learners need Nursing Heaithcare Writing Services, healthcare assignment writing help and nursing essay writing services.
Creative Writing Services Email Homepage
2020-10-14 13:20
Professional creative writing services are essential and they have become very popular for those in need of online creative writing assignment services since most of them seek Creative Writing Services.  https://researchpapers247.com/creative-writing-service/
tertyyoiu Email Homepage
2020-10-21 14:00
Still looking for a way to get rid of the extra housing charges for your pet. If yes, then get your ESA letter for housing today and stop paying any charges for your Emotional Support Animal. https://fastesaletter.com/esa-letter-for-housing/
分页: 8/8 第一页 上页 3 4 5 6 7 8 最后页
发表评论
表情
emotemotemotemotemot
emotemotemotemotemot
emotemotemotemotemot
emotemotemotemotemot
emotemotemotemotemot
打开HTML
打开UBB
打开表情
隐藏
记住我
昵称   密码   游客无需密码
网址   电邮   [注册]