php多进程实现 亲测

1     cd php-version/ext/pcntl  
2     phpize  
3     ./configure && make && make install  
4     cp /usr/lib/php/modules/pcntl.so /usr/lib64/php/modules/pcntl.so  
5     echo "extension=pcntl.so" >> /etc/php.ini  
6     /etc/init.d/httpd restart  

 1     <?php  
 2     header(‘content-type:text/html;charset=utf-8‘ );  
 3       
 4     // 必须加载扩展  
 5     if (!function_exists("pcntl_fork")) {  
 6         die("pcntl extention is must !");  
 7     }  
 8     //总进程的数量  
 9     $totals = 3;  
10     // 执行的脚本数量  
11     $cmdArr = array();  
12     // 执行的脚本数量的数组  
13     for ($i = 0; $i < $totals; $i++) {  
14         $cmdArr[] = array("path" => __DIR__ . "/run.php",  ‘pid‘ =>$i ,‘total‘ =>$totals);  
15     }  
16       
17     /* 
18     展开：$cmdArr 
19     Array 
20     ( 
21         [0] => Array 
22             ( 
23                 [path] => /var/www/html/company/pcntl/run.php 
24                 [pid] => 0 
25                 [total] => 3 
26             ) 
27      
28         [1] => Array 
29             ( 
30                 [path] => /var/www/html/company/pcntl/run.php 
31                 [pid] => 1 
32                 [total] => 3 
33             ) 
34      
35         [2] => Array 
36             ( 
37                 [path] => /var/www/html/company/pcntl/run.php 
38                 [pid] => 2 
39                 [total] => 3 
40             ) 
41      
42     ) 
43     */  
44       
45     pcntl_signal(SIGCHLD, SIG_IGN); //如果父进程不关心子进程什么时候结束,子进程结束后，内核会回收。  
46     foreach ($cmdArr  as   $cmd) {  
47         $pid = pcntl_fork();    //创建子进程  
48         //父进程和子进程都会执行下面代码  
49         if ($pid == -1) {  
50             //错误处理：创建子进程失败时返回-1.  
51             die(‘could not fork‘);  
52         } else if ($pid) {  
53             //父进程会得到子进程号，所以这里是父进程执行的逻辑  
54             //如果不需要阻塞进程，而又想得到子进程的退出状态，则可以注释掉pcntl_wait($status)语句，或写成：  
55             pcntl_wait($status,WNOHANG); //等待子进程中断，防止子进程成为僵尸进程。  
56         } else {  
57             //子进程得到的$pid为0, 所以这里是子进程执行的逻辑。  
58             $path   = $cmd["path"];  
59             $pid = $cmd[‘pid‘] ;  
60             $total = $cmd[‘total‘] ;  
61             echo exec("/usr/bin/php {$path} {$pid} {$total}")."\n";  
62             exit(0) ;  
63         }  
64     }  
65     ?>