CURL post请求

/*****post请求******/
    public function postDataCurl($url,$data=array()){
        $this->checkSumBuilder();        //发送请求前需先生成checkSum
        if(!empty($data)){
            $json=json_encode($data);
        }else{
            $json="";
        }
        $timeout = 5000; 
        $http_header = array(
            'AppKey:'.$this->AppKey,
            'Nonce:'.$this->Nonce,
            'CurTime:'.$this->CurTime,
            'CheckSum:'.$this->CheckSum,
            'Content-Type: application/json;charset=utf-8;',
            'Content-Length: ' . strlen($json)
        );
        $ch = curl_init(); 
        curl_setopt ($ch, CURLOPT_URL, $url);
        curl_setopt ($ch, CURLOPT_POST, 1);
        curl_setopt ($ch, CURLOPT_POSTFIELDS, $json);
        curl_setopt ($ch, CURLOPT_HEADER, false); 
        curl_setopt ($ch, CURLOPT_HTTPHEADER,$http_header);
        curl_setopt ($ch, CURLOPT_SSL_VERIFYPEER,false);
        curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout); 
        curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
       
        $result = curl_exec($ch); 
        if (false === $result) {
            $result =  curl_errno($ch);
        }
        curl_close($ch); 
        return json_decode($result,true) ;
    }