public function batch(array $urls)
{
$multi = curl_multi_init();
$results = array();
// Create the curl handles and add them to the multi_request
foreach (array_values($urls) as $count => $uri) {
$results[$uri] = array();
${$count} = $this->handle($uri, $results[$uri]);
$code = curl_multi_add_handle($multi, ${$count});
if ($code != CURLM_OK) {
throw new \Exception("Curl handle for {$uri} could not be added");
}
}
// Perform the requests
do {
while (($mrc = curl_multi_exec($multi, $active)) == CURLM_CALL_MULTI_PERFORM) {
}
if ($mrc != CURLM_OK && $mrc != CURLM_CALL_MULTI_PERFORM) {
throw new \Exception("Curl error code: {$mrc}");
}
if ($active && curl_multi_select($multi) === -1) {
// Perform a usleep if a select returns -1.
// See: https://bugs.php.net/bug.php?id=61141
usleep(250);
}
} while ($active);
// Figure out why individual requests may have failed
foreach (array_values($urls) as $count => $uri) {
$error = curl_error(${$count});
if ($error) {
$results[$uri]['failure_reason'] = $error;
}
}
return $results;
} /**
* Fetch images via FasterImage library
*
* @param array $urls_to_fetch Image src urls to fetch.
* @param array $images Array to populate with results of image/dimension inspection.
*/
private static function fetch_images_via_faster_image($urls_to_fetch, &$images)
{
if (!class_exists('Faster_Image_B52f1a8_Faster_Image')) {
require_once AMP__DIR__ . '/includes/lib/class-faster-image-b52f1a8-faster-image.php';
}
$user_agent = apply_filters('amp_extract_image_dimensions_get_user_agent', self::get_default_user_agent());
$client = new Faster_Image_B52f1a8_Faster_Image($user_agent);
$images = $client->batch(array_column($urls_to_fetch, 'url'));
}