解析PHP实现多进程并行执行脚本

由于php的进程是不支持多线程的，有些场景为了方便以及提高性能，可以用php实现多进程以弥补这个不足：
复制代码代码如下:
#！/usr/bin/env php
<？php
$cmds=array（
        array（"/apps/bin/launcher.php","charge/promotion_props_stat.php","mobile",1）,
        array（"/apps/bin/launcher.php","charge/promotion_props_stat.php","mobile",2）,
        array（"/apps/bin/launcher.php","charge/promotion_props_stat.php","click",1）,
        array（"/apps/bin/launcher.php","charge/promotion_props_stat.php","click",2）,
        array（"/apps/bin/launcher.php","charge/promotion_props_stat.php",1）,
        array（"/apps/bin/launcher.php","charge/promotion_props_stat.php",2）
）;

foreach（$cmds as $cmd）{
        $pid=pcntl_fork（）;
        if（$pid==-1）{ //进程创建失败
                die（"fork child process failure！"）;
        }
        else if（$pid）{ //父进程处理逻辑
                pcntl_wait（$status,WNOHANG）;
        }
        else{ //子进程处理逻辑
                pcntl_exec（"/usr/local/bin/php",$cmd）;
        }
}