例子，php获取linux服务器状态的代码。
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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