php实现取得cpu和内存的使用情况

linux/freebsd下看内存可以

/*=============================================================
  系统参数探测 LINUX
=============================================================*/
  function sys_linux()
  {
  // CPU
  if (false === ($str = @file(“/proc/cpuinfo”))) return false;
  $str = implode(“”, $str);
  @preg_match_all(“/model\s+name\s{0,}\:+\s{0,}([\w\s\)\(.]+)[\r\n]+/”, $str, $model);
  //@preg_match_all(“/cpu\s+MHz\s{0,}\:+\s{0,}([\d\.]+)[\r\n]+/”, $str, $mhz);
  @preg_match_all(“/cache\s+size\s{0,}\:+\s{0,}([\d\.]+\s{0,}[A-Z]+[\r\n]+)/”, $str, $cache);
  if (false !== is_array($model[1]))
  {
  $res['cpu']['num'] = sizeof($model[1]);
  for($i = 0; $i < $res['cpu']['num']; $i++)
  {
  $res['cpu']['detail'][] = “类型：”.$model[1][$i].” 缓存：”.$cache[1][$i];
  }
  if (false !== is_array($res['cpu']['detail'])) $res['cpu']['detail'] = implode(”
“, $res['cpu']['detail']);
  }

// UPTIME
  if (false === ($str = @file(“/proc/uptime”))) return false;
  $str = explode(” “, implode(“”, $str));
  $str = trim($str[0]);
  $min = $str / 60;
  $hours = $min / 60;
  $days = floor($hours / 24);
  $hours = floor($hours – ($days * 24));
  $min = floor($min – ($days * 60 * 24) – ($hours * 60));
  if ($days !== 0) $res['uptime'] = $days.”天”;
  if ($hours !== 0) $res['uptime'] .= $hours.”小时”;
  $res['uptime'] .= $min.”分钟”;

// MEMORY
  if (false === ($str = @file(“/proc/meminfo”))) return false;
  $str = implode(“”, $str);
  preg_match_all(“/MemTotal\s{0,}\:+\s{0,}([\d\.]+).+?MemFree\s{0,}\:+\s{0,}([\d\.]+).+?SwapTotal\s{0,}\:+\s{0,}([\d\.]+).+?SwapFree\s{0,}\:+\s{0,}([\d\.]+)/s”, $str, $buf);

$res['memTotal'] = round($buf[1][0]/1024, 2);
  $res['memFree'] = round($buf[2][0]/1024, 2);
  $res['memUsed'] = ($res['memTotal']-$res['memFree']);
  $res['memPercent'] = (floatval($res['memTotal'])!=0)?round(($res['memUsed']/$res['memTotal'])*90,2):0;

$res['swapTotal'] = round($buf[3][0]/1024, 2);
  $res['swapFree'] = round($buf[4][0]/1024, 2);
  $res['swapUsed'] = ($res['swapTotal']-$res['swapFree']);
  $res['swapPercent'] = (floatval($res['swapTotal'])!=0)?round(($res['swapUsed']/$res['swapTotal'])*90,2):0;

// LOAD AVG
  if (false === ($str = @file(“/proc/loadavg”))) return false;
  $str = explode(” “, implode(“”, $str));
  $str = array_chunk($str, 3);
  $res['loadAvg'] = implode(” “, $str[0]);

return $res;
  }
/*=============================================================
  系统参数探测 FreeBSD
=============================================================*/
  function sys_freebsd()
  {
  //CPU
  if (false === ($res['cpu']['num'] = get_key(“hw.ncpu”))) return false;
  $res['cpu']['detail'] = get_key(“hw.model”);

//LOAD AVG
  if (false === ($res['loadAvg'] = get_key(“vm.loadavg”))) return false;
  $res['loadAvg'] = str_replace(“{“, “”, $res['loadAvg']);
  $res['loadAvg'] = str_replace(“}”, “”, $res['loadAvg']);

//UPTIME
  if (false === ($buf = get_key(“kern.boottime”))) return false;
  $buf = explode(‘ ‘, $buf);
  $sys_ticks = time() – intval($buf[3]);
  $min = $sys_ticks / 60;
  $hours = $min / 60;
  $days = floor($hours / 24);
  $hours = floor($hours – ($days * 24));
  $min = floor($min – ($days * 60 * 24) – ($hours * 60));
  if ($days !== 0) $res['uptime'] = $days.”天”;
  if ($hours !== 0) $res['uptime'] .= $hours.”小时”;
  $res['uptime'] .= $min.”分钟”;

//MEMORY
  if (false === ($buf = get_key(“hw.physmem”))) return false;
  $res['memTotal'] = round($buf/1024/1024, 2);
  $buf = explode(“\n”, do_command(“vmstat”, “”));
  $buf = explode(” “, trim($buf[2]));

$res['memFree'] = round($buf[5]/1024, 2);
  $res['memUsed'] = ($res['memTotal']-$res['memFree']);
  $res['memPercent'] = (floatval($res['memTotal'])!=0)?round(($res['memUsed']/$res['memTotal'])*90,2):0;

$buf = explode(“\n”, do_command(“swapinfo”, “-k”));
  $buf = $buf[1];
  preg_match_all(“/([0-9]+)\s+([0-9]+)\s+([0-9]+)/”, $buf, $bufArr);
  $res['swapTotal'] = round($bufArr[1][0]/1024, 2);
  $res['swapUsed'] = round($bufArr[2][0]/1024, 2);
  $res['swapFree'] = round($bufArr[3][0]/1024, 2);
  $res['swapPercent'] = (floatval($res['swapTotal'])!=0)?round(($res['swapUsed']/$res['swapTotal'])*90,2):0;

return $res;
  }

/*=============================================================
  取得参数值 FreeBSD
=============================================================*/
  function get_key($keyName)
  {
  return do_command(‘sysctl’, “-n $keyName”);
  }

/*=============================================================
  确定执行文件位置 FreeBSD
=============================================================*/
  function find_command($commandName)
  {
  $path = array(‘/bin’, ‘/sbin’, ‘/usr/bin’, ‘/usr/sbin’, ‘/usr/local/bin’, ‘/usr/local/sbin’);
  foreach($path as $p)
  {
  if (@is_executable(“$p/$commandName”)) return “$p/$commandName”;
  }
  return false;
  }

/*=============================================================
  执行系统命令 FreeBSD
=============================================================*/
  function do_command($commandName, $args)
  {
  $buffer = “”;
  if (false === ($command = find_command($commandName))) return false;
  if ($fp = @popen(“$command $args”, ‘r’))
  {
while (!@feof($fp))
{
$buffer .= @fgets($fp, 4096);
}
return trim($buffer);
}
  return false;
  }

memory用此函数可搞定: memory_get_usage()

在Windows下面只能读取cmd命令运行的结果

例如：
$a = system(‘mem’);
echo $a.”

---

“;
或者
$a = system(‘mem’);
echo $a.”

---

“;