如何确保我的服务器响应具有PHP的Content-Length标头？

Question

This is how I response from my server:

include('../connection.php');
connection();
mysql_query('SET NAMES utf8');

$response = array();
$words = array();


$query = "SELECT * FROM `$table` ORDER BY `created_at` DESC";
$result = mysql_query($query);

while ($row = mysql_fetch_assoc($result)) {

    $row['id'] = intval($row['id']);
    array_push($words, $row);
}

$response['words'] = $words;

echo json_encode($response);

But I really need here Content-Length header. How can I check or add/create such header?

Answer 1

PHP handles this for you if you enable output buffeting. When you write to the output stream (via the buffer) PHP knows how much you've written and sets the header value before sending the response body.