关于PHP和nodejs的问题

[Mr_liangGG]

ini_set("display_errors", "On");
error_reporting(E_ALL | E_STRICT);
header("Access-Control-Allow-Origin: *");

$extens='2933|2934|2935|2936|2937|2938|2939|2940|2925|2922|2721|2913|2916|2790|2789|2788|2712|2713|2722|2717|2714|2716|2684|2687|2900';
$extens=" | grep -E '$extens'";
$command="rasterisk -x 'core show hints'".$extens;
$exten=get_exten_status($command);
$work=get_exten_work($exten);
if(!empty($work)){
    $work=" | grep  -E '$work'";
    $command="rasterisk -x 'core show channels verbose'| grep -w 'Dial'".$work;
    $exten=get_exten_other($exten,$command);
    $work=get_exten_work($exten);
    if(!empty($work)){
        $work=" | grep  -E '$work'";
        $command="rasterisk -x 'core show channels verbose' | grep -w  'Transferred' | grep 'dial'".$work;
        $exten=get_exten_other($exten,$command);
    }
}

echo json_encode($exten);


/*
  获取工作中的分机
*/
function get_exten_work($exten){
    $work='';
    foreach ($exten as $key => $value) {
        if($value['status']=='Ringin'||$value['status']=='InUse'){
            if(!isset($value['other'])){
                $work.=$value['name'].'|';
            }
        }
    }
    $work=substr($work, 0,-1);
    return $work;
}
/*
  获取分机状
*/
function get_exten_status($command){
    exec($command,$res);
    $exten=array();
    $i=0;
    foreach ($res as $key => $value) {
        $f=strpos($value, 'SIP/');
        if($f===false){
            continue;
        }else{
            $exten[$key]['name']=substr($value, $f+4,4);
            if(strpos($value,'Unavailable')){
                $exten[$key]['status']='Unavailable';
            }else if(strpos($value,'Idle')){
                $exten[$key]['status']='Idle';
            }else if(strpos($value,'Busy')){
                $exten[$key]['status']='Busy';
            }else if(strpos($value,'Ringin')){
                $exten[$key]['status']='Ringin';
            }
            else if(strpos($value,'InUse')){
                $exten[$key]['status']='InUse';
            }/*
            else if(strpos($value,'Hold')){
                $exten[$key]['status']='Hold';
            }*/
            else{
                $exten[$key]['status']='undefined';
            }
            $i++;
        }
    }
    return $exten;
}
/*
  获取与分机通话的对方号
*/
function get_exten_other($exten,$command){
    exec($command,$res);
    $work=array();
    foreach ($exten as $key => $value) {
        foreach ($res as $k => $val) {
            $f=strpos($val, $value['name']);
            if($f===false){
                continue;
            }else{
                preg_match_all('/SIP\/(\d+).+SIP\/\S+\/(\d+)|.+SIP\/(\d+)\S+\s+(\d+)/i', $val, $temp);
                foreach ($temp as $i => $v) {
                    if(isset($v[0])&&$v[0]!=''&&$v[0]!=$value['name']){
                        if(strlen($v[0])>8){
                            $v[0]=substr($v[0], -8);
                        }
                        $exten[$key]['other']=$v[0];
                    }
                }
            }
        }
    }
    return $exten;
}

var app = require('express')();
var http = require('http').Server(app);
var request = require('request');
var io = require('socket.io')(http);
process.env.NODE_TLS_REJECT_UNAUTHORIZED = '0';

io.on('connection',function(socket){
  var obj;
  setInterval(function(){
    request('https://192.168.80.100/extenStatus.php', function (error, response, body) {
      request('https://192.168.10.187/extenStatus.php',function(err,res,b){
        request('https://192.168.80.108/extenStatus2.php',function(err2,res2,b2){
          if (!error && !err && !err2 && response.statusCode == 200 && res.statusCode==200 && res2.statusCode==200) {
            body=isJSON(body);
            b=isJSON(b);
            b2=isJSON(b2);
            if(body!=false&&b!=false&&b2!=false){
              temp=merge_JSON(body,b);
              obj=merge_JSON(temp,b2);
            }else if(body){
              obj=body;
            }else if(b){
              obj=b;
            }else if(b2){
              obj=b2;
            }else{
              obj=null;
            }
          }else if(!error && response.statusCode==200){
            body=isJSON(body);
            if(body!=false){
              obj=body;
            }else{
              obj=null;
            }
          }else if(!err && res.statusCode==200){
            b=isJSON(b);
            if(b!=false){
              obj=b;
            }else{
              obj=null;
            }
          }else if(!err2 && res2.statusCode==200){
            b2=isJSON(b2);
            if(b2!=false){
              obj=b2;
            }else{
              obj=null;
            }
          }else{
            obj=null;
          }
          io.emit('exten_status',JSON.stringify(obj));
        });
      });
    });
  },2000);
});


http.listen(3000);

merge_JSON=function(a,b){
  var res=new Array();
  for(var i=0;i<a.length;i++){
    res[i]=a[i];
  }
  for (var j = 0; j < b.length; i++,j++) {
    res[i]=b[j];
  }
  return res;
}

isJSON=function(json){
  try{
    json=JSON.parse(json);
  }catch(e){
    return false;//转化失败捕捉错误返回false
  }
  return json;//转换成功则返回true
}

问题是nodejs request模块引用php文件，然后接收json过来的值，这样虽然能实现功能，但是这样的代码性能并不是很好，在linux服务器运行的，cpu占用率百分之20%，内存一直增加，不会降下来，导致有时候页面会卡死。

我觉得node每次都要setInterval不停的调用，很耗性能，不知道论坛里的大神是否能帮我解决这个问题，本人对node很陌生，毕竟是基于PHP开发的。