";
		print_r($info);
    }
	
	public function _token()
	{
		$url = 'https://api.sandbox.paypal.com/v1/oauth2/token';
        $header[] = 'Content-Type: application/json';
        $header[] = 'Accept-Language: en_US';
        $header[] = 'Accept: */*';
        $data = array('grant_type' => 'client_credentials');//请求头内容
        $method = 'POST';
        $hf_path = $_SERVER["DOCUMENT_ROOT"] . '/data/hf_access_token.txt';
        $hf_access_token = '';
        if(file_exists($hf_path))
		{
            $file_read = fopen($hf_path, 'r');
            $access_str = fgets($file_read);
            fclose($file_read);
            $access_arr = explode(':', $access_str);
            if (time() < intval($access_arr[0])) 
			{
				$hf_access_token = isset($access_arr[1]) ? $access_arr[1] : '';
            }
        }
        if(!$hf_access_token)
		{
            $file = fopen($hf_path, 'w');
            $hf_account = 'paypal-facilitator@supernovahair.com';
            $client_id = 'Ae5ZECTwT-JY-GrHW2-XW234yJ4tYT-7RAt3s1mY8GtW1rX470Kr8weXkCH3GMaO-V7mnmnCTsxFvsiy';
            $secret_id = 'EOiZjIwRaiK3pvbJgMURKcGy6ULt5YCGLkqN7WngwG-r34brYrfVwS6ECI8cig7l8lOObvF-ukeZxB-3';
            $userpwd = $client_id . ':' . $secret_id;
            $info = $this->_curl($data,$url,3000,$method,true,$header,$userpwd);
            $result = json_decode($info,true);
            $access_new = (time() + $result['expires_in']) . ':' . $result['access_token'];
            fwrite($file, $access_new);
            fclose($file);
			$hf_access_token = $result['access_token'];
		}
		return $hf_access_token;
    }
	
	public function _curl($data,$url,$timeout=300,$httptype="POST",$date_type=false,$header=array(),$userpwd='')
    {
    
        if ($date_type == 'http_build_query')
		{
            $data = http_build_query($data);
        }
		else if ($date_type == 'json')
		{
            $data = json_encode($data);
        }

        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_POSTFIELDS,$data);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_HEADER, false);
        switch ($httptype)
		{
            case "GET":
            curl_setopt($ch, CURLOPT_HTTPGET, true);
            curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "GET");
            break;
			
            case "POST":
            curl_setopt($ch, CURLOPT_POST, true);
            curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
            break;
			
            case "PUT":
            curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "PUT");
            break;
			
            case "DELETE":
            curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "DELETE");
            break;
        }
        $isSecure = strpos($url, "https://");
        if ($isSecure === 0)
		{
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
            curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
        }
        if(!empty($header))
		{
            curl_setopt($ch, CURLOPT_SSLVERSION , 6); //NEW ADDITION
            curl_setopt($ch,CURLOPT_HTTPHEADER,$header);
        }

        if(!empty($userpwd))
		{
            curl_setopt($ch,CURLOPT_USERPWD,$userpwd);
        }
        curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
        $result = curl_exec($ch);
        curl_close($ch);
        return $result;
    }
}