#### 方案一:
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"
1 <?php 2 class test_thread_run extends Thread 3 { 4 public $url; 5 public $data; 6 7 public function __construct($url) 8 { 9 $this->url = $url; 10 } 11 12 public function run() 13 { 14 if(($url = $this->url)) 15 { 16 $this->data = model_http_curl_get($url); 17 } 18 } 19 } 20 21 function model_thread_result_get($urls_array) 22 { 23 foreach ($urls_array as $key => $value) 24 { 25 $thread_array[$key] = new test_thread_run($value["url"]); 26 $thread_array[$key]->start(); 27 } 28 29 foreach ($thread_array as $thread_array_key => $thread_array_value) 30 { 31 while($thread_array[$thread_array_key]->isRunning()) 32 { 33 usleep(10); 34 } 35 if($thread_array[$thread_array_key]->join()) 36 { 37 $variable_data[$thread_array_key] = $thread_array[$thread_array_key]->data; 38 } 39 } 40 return $variable_data; 41 } 42 43 function model_http_curl_get($url,$userAgent="") 44 { 45 $userAgent = $userAgent ? $userAgent : 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2)'; 46 $curl = curl_init(); 47 curl_setopt($curl, CURLOPT_URL, $url); 48 curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1); 49 curl_setopt($curl, CURLOPT_TIMEOUT, 5); 50 curl_setopt($curl, CURLOPT_USERAGENT, $userAgent); 51 $result = curl_exec($curl); 52 curl_close($curl); 53 return $result; 54 } 55 56 for ($i=0; $i < 100; $i++) 57 { 58 $urls_array[] = array("name" => "baidu", "url" => "http://www.baidu.com/s?wd=".mt_rand(10000,20000)); 59 } 60 61 $t = microtime(true); 62 $result = model_thread_result_get($urls_array); 63 $e = microtime(true); 64 echo "多线程:".($e-$t)."\n"; 65 66 $t = microtime(true); 67 foreach ($urls_array as $key => $value) 68 { 69 $result_new[$key] = model_http_curl_get($value["url"]); 70 } 71 $e = microtime(true); 72 echo "For循环:".($e-$t)."\n"; 73 ?>
#### 方案二
以前使用curl的多线程并不是真正的多线程,只是一种模拟的多线程,现在使用pthreads来实现真正意义上的多线程。
下载:
windows下:
http://windows.php.net/downloads/pecl/releases/pthreads/0.0.45/
mac、unix、linux下:
https://github.com/krakjoe/pthreads
安装方式:
windows下:
解压得到pthreadVC2.dll和php_pthreads.dll文件,把vc2文件放到php.exe同级目录,把php_pthreads.dll放到扩展目录下。
修改php.ini文件 添加extension=php_pthreads.dll
修改Apache配置文件httpd.conf 添加LoadFile "yourpath/php/pthreadVC2.dll"
mac、unix、linux下:
具体可参考宴哥的博客http://blog.s135.com/pthreads/
调用方式:
具体的用法也可以参考宴哥的博客http://blog.s135.com/pthreads/
结合以前的get_html也可以这样来实现类
1 class threads extends Thread 2 { 3 public $url = ''; 4 public $options = array(); 5 public $data; 6 7 public function __construct($url, $options = array()){ 8 $this->url = $url; 9 $this->options = $options; 10 } 11 12 public function run(){ 13 if(!empty($this->url)){ 14 $this->data = $this->get_html($this->url, $this->options); 15 } 16 } 17 18 public function get_html($url,$options = array()){ 19 if(empty($options)){ 20 $options[CURLOPT_RETURNTRANSFER] = true; 21 $options[CURLOPT_TIMEOUT] = 5; 22 } 23 $ch = curl_init($url); 24 curl_setopt_array($ch,$options); 25 $html = curl_exec($ch); 26 curl_close($ch); 27 if($html === false){ 28 return false; 29 } 30 return $html; 31 } 32 }