PHP同时运行多个脚本

我有一个带有对象服务器的数组，如下所示：

Array
(
    [0](
                (
                    [id] => 1
                    [version] => 1
                    [server_addr] => 192.168.5.210
                    [server_name] => server1
                )
        )
    [1](
                (
                    [id] => 2
                    [server_addr] => 192.168.5.211
                    [server_name] => server2
                )
        )
)

通过运行下面的代码，我可以获得所需的输出

foreach ($model as $server) {
        $cpu_usage = shell_exec('sudo path/to/total_cpu_usage.sh '.$server->server_addr);
        $memory_usage = shell_exec('sudo path/to/total_memory_usage.sh '.$server->server_addr);
        $disk_space = shell_exec('sudo path/to/disk_space.sh '.$server->server_addr);
        $inode_space = shell_exec('sudo path/to/inode_space.sh '.$server->server_addr);
        $network = shell_exec('sudo path/to/network.sh '.$server->server_addr);
        exec('sudo path/to/process.sh '.$server->server_addr, $processString);
        $processArray = array();
        foreach ($processString as $i) {
          $row = explode(" ", preg_replace('/\s+/', ' ', $i));
          array_push($processArray,$row);
        }
        $datetime = shell_exec('sudo path/to/datetime.sh '.$server->server_addr);
        echo $cpu_usage;
        echo $mem_usage;
        echo $disk_space;
        ......
}

我的脚本类似：

#!/bin/bash
if [ "$1" == "" ]
then
        echo "To start monitor, please provide the server ip:"
        read IP
else
        IP=$1
fi

ssh root@$IP "date"

但 5 台服务器的整个过程大约需要 10 秒，而 1 台服务器的整个过程不到 2 秒。这是为什么？有什么办法可以减少时间吗？我的猜测是 exec 命令正在等待输出分配给变量，然后再进入下一个循环？我尝试用谷歌搜索一下，但大多数答案都是根本不返回任何输出......但我需要输出

您可以同时运行脚本popen()并稍后获取输出fread().

//execute
foreach ($model as $server) {
    $server->handles = [
        popen('sudo path/to/total_cpu_usage.sh '.$server->server_addr, 'r'),
        popen('sudo path/to/total_memory_usage.sh '.$server->server_addr, 'r'),
        popen('sudo path/to/disk_space.sh '.$server->server_addr, 'r'),
        popen('sudo path/to/inode_space.sh '.$server->server_addr, 'r'),
        popen('sudo path/to/network.sh '.$server->server_addr, 'r'),
    ];
}

//grab and store the output, then close the handles
foreach ($model as $server) {
    $server->cpu_usage = fread($server->handles[0], 4096);
    $server->mem_usage = fread($server->handles[1], 4096);
    $server->disk_space = fread($server->handles[2], 4096);
    $server->inode_space = fread($server->handles[3], 4096);
    $server->network = fread($server->handles[4], 4096);

    foreach($server->handles as $h) pclose($h);
}

//print everything
print_r($model);

我测试了类似的代码来执行 5 个休眠 2 秒的脚本，整个过程只花了 2.12 秒 而不是 10.49 秒shell_exec().

更新1：非常感谢马库斯·奥 https://stackoverflow.com/users/4630325指出优化潜力。

更新2：修改了代码以消除覆盖的可能性。 结果现在在里面$model.

这还可以显示哪个服务器拒绝连接，以防有关 sshd 的问题影响您。