php获取linux服务器CPU、内存、硬盘使用率的实现代码

<?php
define("MONITORED_IP", "172.16.0.191");  //被监控的服务器IP地址  也就是本机地址
define("DB_SERVER", "172.16.7.2");       //存放数据的服务器IP地址
define("DB_USER", "root");
define("DB_PWD","111111");
define("DB_NMAE","performance");
 
class MyConnect{
 public function connect($db_server,$db_user,$db_pwd,$db_name){
 
  $conn = mysql_connect($db_server,$db_user,$db_pwd);
  if (!$conn){
   die('连接数据库失败: ' . mysql_error());
  }
  $flag = mysql_select_db($db_name,$conn);
  if(!$flag){
   echo "<p align='center'>数据库连接出错!</p>";exit();
  }else{
   mysql_query("SET NAMES UTF8");
  }
 }
}
?>

<?php
/**
 * 获取服务器性能CPU、内存、硬盘等使用率
 * Edit www.jbxue.com
*/
 /*连接数据 begin*/
 include("conn.php");
 $obj_MyConnect = new MyConnect();
 $obj_MyConnect -> connect(DB_SERVER,DB_USER,DB_PWD,DB_NMAE);
 /*连接数据 end*/
 
 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);
 }
 
 //echo date("Y-m-d H:i:s",time())."<br>";
 
 $status=get_used_status();
 
 $sql = "insert into performance(ip,cpu_usage,mem_usage,hd_avail,hd_usage,tast_running,detection_time) ";
 $sql .= " value('".MONITORED_IP."','".$status['cpu_usage']."','".$status['mem_usage']."','".$status['hd_avail']."','".$status['hd_usage']."','".$status['tast_running']."','".$status['detection_time']."')";
 $query = mysql_query($sql) or die("SQL 语句执行失败!");
 unset($status);
 
 //echo date("Y-m-d H:i:s",time())."<br>";
?>