使用CURL将2个字符串从一个PHP文件传递到另一个PHP文件

My first.php file

$statusString = "u=10000;t1=1479409;s=10;r=-33;v=3.68;";
$macaddress= "10000";
$url = 'second.php';
$fields = array(
    'newFormat'=>urlencode($statusString),
    'MACAddress'=>urlencode($macaddress)
   );
$fields_string = '';
foreach($fields as $key=>$value) 
{ 
    $fields_string .= $key.'='.$value.'&'; 
}
rtrim($fields_string,'&');
$ch = curl_init();

curl_setopt($ch,CURLOPT_URL, $url);
curl_setopt($ch,CURLOPT_POST, count($fields));
curl_setopt($ch,CURLOPT_POSTFIELDS, $fields_string);

$result = curl_exec($ch);   
curl_close($ch);

Here I am trying to send data from my first.php to my second.php

My second.php file

if (isset($_GET['newFormat']))
{ 
    $str = $_GET['newFormat'];
}
else 
    $str = 'no data';
if (isset($_GET['MACAddress']))
{ 
    $macAddress = $_GET['MACAddress'];
}

Here I am trying to retrieve the data sent by first.php.

My first.php invokes second.php, but second.php cannot retrieve any data. In my second.php, $str turn out to be 'no data' as in the the else part and $macAddress is empty! Can anyone please help me solve this?

In second.php, should be using _POST and not _GET