Source
File: wp-includes/Requests/Cookie/Jar.php
public function before_request($url, &$headers, &$data, &$type, &$options) {
if (!$url instanceof Requests_IRI) {
$url = new Requests_IRI($url);
}
if (!empty($this->cookies)) {
$cookies = array();
foreach ($this->cookies as $key => $cookie) {
$cookie = $this->normalize_cookie($cookie, $key);
// Skip expired cookies
if ($cookie->is_expired()) {
continue;
}
if ($cookie->domain_matches($url->host)) {
$cookies[] = $cookie->format_for_header();
}
}
$headers['Cookie'] = implode('; ', $cookies);
}
}