public static function extract_links($post_id, $cache_immediately = false)
{
$result = array();
$post = get_post($post_id);
$text = $post->post_content;
$re = '/href=["\'](http[^\\v()<>{}\\[\\]"\']+)[\'"]/i';
$count = preg_match_all($re, $text, $matches);
$links = Amber::filter_regexp_excluded_links($matches[1]);
if ($count) {
$result = Amber::cache_links($links['cache'], $cache_immediately);
}
foreach ($links['excluded'] as $key) {
$result[$key] = "";
}
return $result;
}
