.m3u8 to .mp3

function getMp3FromM3u8($url) {
    // Not a m3u8 url
    if (!strpos($url, "index.m3u8?")) {
        return $url;
    }
    if (strpos($url, "/audios/")) {
        return preg_replace('~^(.+?)/[^/]+?/audios/([^/]+)/.+$~', '\\1/audios/\\2.mp3', $url);
    } else {
        return preg_replace('~^(.+?)/(p[0-9]+)/[^/]+?/([^/]+)/.+$~', '\\1/\\2/\\3.mp3', $url);
    }
}