php 获得CPU使用率 获得内存使用率数组

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<?php
 header("Content-type: text/html; charset=utf-8");
class SystemInfoWindows
{
 /**
  * 判断指定路径下指定文件是否存在，如不存在则创建
  * @param string $fileName 文件名
  * @param string $content 文件内容
  * @return string 返回文件路径
  */
 private function getFilePath($fileName, $content)
 {
  $path = dirname(__FILE__) . "\$fileName";
  if (!file_exists($path)) {
   file_put_contents($path, $content);
  }
  return $path;
 }
 /**
  * 获得cpu使用率vbs文件生成函数
  * @return string 返回vbs文件路径
  */
 private function getCupUsageVbsPath()
 {
  return $this->getFilePath(
   'cpu_usage.vbs',
   "On Error Resume Next
    Set objProc = GetObject("winmgmts:\\.\rootcimv2:win32_processor='cpu0'")
    WScript.Echo(objProc.LoadPercentage)"
  );
 }
 /**
  * 获得总内存及可用物理内存JSON vbs文件生成函数
  * @return string 返回vbs文件路径
  */
 private function getMemoryUsageVbsPath()
 {
  return $this->getFilePath(
   'memory_usage.vbs',
   "On Error Resume Next
    Set objWMI = GetObject("winmgmts:\\.\rootcimv2")
    Set colOS = objWMI.InstancesOf("Win32_OperatingSystem")
    For Each objOS in colOS
     Wscript.Echo("{""TotalVisibleMemorySize"":" & objOS.TotalVisibleMemorySize & ",""FreePhysicalMemory"":" & objOS.FreePhysicalMemory & "}")
    Next"
  );
 }
 /**
  * 获得CPU使用率
  * @return Number
  */
 public function getCpuUsage()
 {
  $path = $this->getCupUsageVbsPath();
  exec("cscript -nologo $path", $usage);
  return $usage[0];
 }
 /**
  * 获得内存使用率数组
  * @return array
  */
 public function getMemoryUsage()
 {
  $path = $this->getMemoryUsageVbsPath();
  exec("cscript -nologo $path", $usage);
  $memory = json_decode($usage[0], true);
  $memory['usage'] = Round((($memory['TotalVisibleMemorySize'] - $memory['FreePhysicalMemory']) / $memory['TotalVisibleMemorySize']) * 100);
  return $memory;
 }
}

$info = new SystemInfoWindows();
$cpu = $info->getCpuUsage();
$memory = $info->getMemoryUsage();
echo "当前系统CPU使用率：{$cpu}%，内存使用率{$memory['usage']}%";