用POST将数组传递到另一个页面

$r=mysql_query(\"select * from pay where PayID=1\");
$ar=array();
while ($record=mysql_fetch_array($r))
{
array_push($ar,$record[\'Reserveid\']);
}
var_dump($ar);
$url = \'http://--/a.php\';
$client = curl_init($url);
curl_setopt($client, CURLOPT_POST,1);
$data = array(
    \'r\' =>$ar
);
curl_setopt($client, CURLOPT_POSTFIELDS,$data);
curl_setopt ($client, CURLOPT_RETURNTRANSFER,1);
curl_setopt($client, CURLOPT_FOLLOWLOCATION, 1);
$response = curl_exec($client);
echo $response;

$r=$_POST[\'r\'];
var_dump($r);

array(3) { ...... } 
-------------------------------
string(5) \"Array\"