PHP Curl发送空数组

<?PHP
$tamanho = $_REQUEST['tamanho'];

$post_data['item_quant'] = $_REQUEST['item_quant'];
$post_data['email_cobranca'] = $_REQUEST['email_cobranca'];
$post_data['tipo'] = $_REQUEST['tipo'];
$post_data['moeda'] = $_REQUEST['moeda'];
$post_data['item_id'] = $_REQUEST['item_id'].$tamanho;
$post_data['item_descr'] = $_REQUEST['item_descr'].'%20Tamanho%20'.$tamanho;
$post_data['item_valor'] = $_REQUEST['item_valor'];
$post_data['peso'] = $_REQUEST['peso'];
$post_data['encoding'] = $_REQUEST['encoding'];
$post_data['submit_01'] = $REQUEST['submit_01'];

$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, "[erased for security]");
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_POSTFIELDS, $post_data);
$result = curl_exec($curl);
curl_close($curl);

header('Location:[erased for security]');
?>

在$result变量处不会通知任何错误。

curl_getinfo($curl)的输出完美地显示了数组的发送。

环境是PHP 5,使用的库是PHP_curl.dll。

在A页发送数组和B页接收数组之间发生了一些事情。