Передать-Получить POST массив

$ch = curl_init();
 
$data = array('name' => 'Foo', 'file' => 'test');
 
curl_setopt($ch, CURLOPT_URL, 'http://domain.ru/receive.php');
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
 
$res = curl_exec($ch);

$post1 = $_POST[$data[name]];
$post2 = $_POST[$data[file]];
$post3 = $_POST['data'];
$post3 = $post3[name];
 
// Пишем в файл
$file = 'temp.txt';
$current = file_get_contents($file);
$current .= "$post1$post2$post3";
file_put_contents($file, $current);

<?php
$ch = curl_init();
$data = array("name" => "Foo", "file" => "test");
curl_setopt($ch, CURLOPT_URL, "http://localhost/1.php");
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
curl_exec($ch);
curl_close($ch);

<?php
$file = "temp.txt";
$current = "";
if (is_file($file))
    $current .= file_get_contents($file);
$current .= $_POST['name'].PHP_EOL.$_POST['file'].PHP_EOL;
file_put_contents($file, $current);