PHP から別の PHP ページへの POST リクエストを行うにはどうすればよいですか?

<code class="php">// URL for the POST request
$url = 'http://foo.com/script.php';

// POST data
$fields = ['field1' => $field1, 'field2' => $field2];

// Build URL-encoded data
$postvars = http_build_query($fields);

// Initialize cURL connection
$ch = curl_init();

// Set URL, POST details, and POST data
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST, count($fields));
curl_setopt($ch, CURLOPT_POSTFIELDS, $postvars);

// Execute POST request
$result = curl_exec($ch);

// Close cURL connection
curl_close($ch);</code>