时间:2021-07-01 10:21:17 帮助过:18人阅读
1、linux下的php多线程
下面所讲的东西是源自php的pcntl_fork函数.因为这个函数依赖操作系统fork的实现,所以本文所讲的东西只适用于linux/unix。那么先看看这个函数的用法吧.php手册上是这么说的:
<?php$pid = pcntl_fork();if ($pid == -1) { die('could not fork'); } else if ($pid) { // we are the parent pcntl_wait($status); //Protect against Zombie children} else { // we are the child}?>
通过pcntl_fork创建一个子进程,如果返回值是-1的话,那么说明子进程创建失败.创建成功的进程id会返回给父进程,0返回给子进程.不好理解吧,所以应该这样写:
<?php$pid = pcntl_fork();if($pid == -1){ //创建失败咱就退出呗,没啥好说的 die('could not fork'); }else{ if($pid){ //从这里开始写的代码是父进程的,因为写的是系统程序,记得退出的时候给个返回值 exit(0); } else{ //从这里开始写的代码都是在新的进程里执行的,同样正常退出的话,最好也给一个返回值 exit(0); } }?>
这样一改好理解多了,如果你父进程希望知道子进程正常退出的话,可以加上前面的pcntl_wait。
2.通过stream_socket_client 方式
function sendStream() { $english_format_number = number_format($number, 4, '.', ''); echo $english_format_number; exit(); $timeout = 10; $result = array(); $sockets = array(); $convenient_read_block = 8192; $host = "test.local.com"; $sql = "select waybill_id,order_id from xm_waybill where status>40 order by update_time desc limit 1 "; $data = Yii::app()->db->createCommand($sql)->queryAll(); $id = 0; foreach ($data as $k => $v) { if ($k % 2 == 0) { $send_data[$k]['body'] = NoticeOrder::getSendData($v['waybill_id']); } else { $send_data[$k]['body'] = array($v['order_id'] => array('extra' => 16)); } $data = json_encode($send_data[$k]['body']); $s = stream_socket_client($host . ":80", $errno, $errstr, $timeout, STREAM_CLIENT_ASYNC_CONNECT | STREAM_CLIENT_CONNECT); if ($s) { $sockets[$id++] = $s; $http_message = "GET /php/test.php?data=" . $data . " HTTP/1.0\r\nHost:" . $host . "\r\n\r\n"; fwrite($s, $http_message); } else { echo "Stream " . $id . " failed to open correctly."; } } while (count($sockets)) { $read = $sockets; stream_select($read, $w = null, $e = null, $timeout); if (count($read)) { /* stream_select generally shuffles $read, so we need to compute from which socket(s) we're reading. */ foreach ($read as $r) { $id = array_search($r, $sockets); $data = fread($r, $convenient_read_block); if (strlen($data) == 0) { echo "Stream " . $id . " closes at " . date('h:i:s') . ".<br> "; fclose($r); unset($sockets[$id]); } else { $result[$id] = $data; } } } else { /* A time-out means that *all* streams have failed to receive a response. */ echo "Time-out!\n"; break; } } print_r($result); }
3、通过多进程代替多线程
function daemon($func_name,$args,$number){ while(true){ $pid=pcntl_fork(); if($pid==-1){ echo "fork process fail"; exit(); }elseif($pid){//创建的子进程 static $num=0; $num++; if($num>=$number){ //当进程数量达到一定数量时候,就对子进程进行回收。 pcntl_wait($status); $num--; } }else{ //为0 则代表是子进程创建的,则直接进入工作状态 if(function_exists($func_name)){ while (true) { $ppid=posix_getpid(); var_dump($ppid); call_user_func_array($func_name,$args); sleep(2); } }else{ echo "function is not exists"; } exit(); } } } function worker($args){ //do something } daemon('worker',array(1),2);
php真正的多线程实现方式,通过安装php的扩展 pthread 可以做到。
然后刷新的页面如下,拖到最底部:
下一页找到版本2的
下载下来,这个v2 才是php5才可以使用的
下载下来,安装:
或者,您直接这样下载:
cd /tools wget https://github.com/krakjoe/pthreads/archive/v2.0.10.zip unzip v2.0.10.zip cd pthreads-2.0.10 /usr/local/php/bin/phpize ./configure --with-php-config=/usr/local/php/bin/php-config make make install
注意:您的php 在编译的时候需要开启 –enable-maintainer-zts
./configure --prefix=/usr/local/php --disable-fileinfo --enable-fpm --with-config-file-path=/etc --with-config-file-scan-dir=/etc/php.d --with-openssl --with-zlib --with-curl --enable-ftp --with-gd --with-xmlrpc --with-jpeg-dir --with-png-dir --with-freetype-dir --enable-gd-native-ttf --enable-mbstring --with-mcrypt=/usr/local/libmcrypt --enable-zip --with-mysql=/usr/local/mysql --without-pear --enable-maintainer-zts
vim /etc/php.ini 添加 extension=pthreads.so
重启php /etc/init.d/php-fpm restart
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