简单的linux下的php获取服务器状态的代码，不多说-直接上函数：

function get_used_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

//print_r($hd);

/*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);

/*获取IP地址 begin*/

/*

$fp = popen('ifconfig eth0 | grep -E "(inet addr)"','r');

$rs = fread($fp,1024);

pclose($fp);

$rs = preg_replace("/\s{2,}/",' ',trim($rs)); //把多个空格换成 “_”

$rs = explode(" ",$rs);

$ip = trim($rs[1],'addr:');

*/

/*获取IP地址 end*/

/*

$file_name = "/tmp/data.txt"; // 绝对路径: homedata.dat

$file_pointer = fopen($file_name, "a+"); // "w"是一种模式，详见后面

fwrite($file_pointer,$ip); // 先把文件剪切为0字节大小， 然后写入

fclose($file_pointer); // 结束

*/

return array('cpu_usage'=>$cpu_usage,'mem_usage'=>$mem_usage,'hd_avail'=>$hd_avail,'hd_usage'=>$hd_usage,'tast_running'=>$tast_running,'detection_time'=>$detection_time);

}

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