<?php
    function get_server_status()
    {
        $fp = popen('top -b -n 2 | grep -E "^(Cpu|Mem|Tasks)"', "r");//获取某一时刻系统cpu和内存使用情况
        $rs = "";
        while (!feof($fp)) {
        $rs .= fread($fp, 1024);
        }
        pclose($fp);
        $sys_info = explode("\n", $rs);

        $tast_info = explode(",", $sys_info[3]);//进程 数组
        $cpu_info = explode(",", $sys_info[4]); //CPU占有量 数组
        $mem_info = explode(",", $sys_info[5]); //内存占有量 数组

        //正在运行的进程数
        $tast_running = trim(trim($tast_info[1], 'running'));
        //CPU占有量
        $cpu_usage = trim(trim($cpu_info[0], 'Cpu(s): '), '%us'); //百分比

        //内存占有量
        $mem_total = trim(trim($mem_info[0], 'Mem: '), 'k total');
        $mem_used = trim($mem_info[1], 'k used');
        $mem_usage = round(100 * intval($mem_used) / intval($mem_total), 2); //百分比

        /*硬盘使用率 begin*/
        $fp = popen('df -lh | grep -E "^(/)"', "r");
        $rs = fread($fp, 1024);
        pclose($fp);
        $rs = preg_replace("/\s{2,}/", ' ', $rs); //把多个空格换成 “_”
        $hd = explode(" ", $rs);
        $hd_avail = trim($hd[3], 'G'); //磁盘可用空间大小 单位G
        $hd_usage = trim($hd[4], '%'); //挂载点 百分比
        /*硬盘使用率 end*/

        //检测时间
        $fp = popen("date +\"%Y-%m-%d %H:%M\"", "r");
        $rs = fread($fp, 1024);
        pclose($fp);
        $detection_time = trim($rs);

        $result = [
            'cpu_usage' => $cpu_usage,
            'mem_usage' => $mem_usage,
            'hd_avail' => $hd_avail,
            'hd_usage' => $hd_usage,
            'tast_running' => $tast_running,
            'detection_time' => $detection_time
        ];
        return $result;
    }