此功能有时只能工作

Question

function getYoutubeVideoId($url) {
    $urlParts = parse_url($url);

    if($urlParts === false)
        return false;

    if(isset($urlParts['host']) && strtolower($urlParts['host']) === 'youtu.be')
        return ltrim($urlParts['path'], '/');

    if(isset($urlParts['query'])) {
        parse_str($urlParts['query'], $queryParts);

        if(isset($queryParts['v']))
            return $queryParts['v'];
    }

    return false;
}

This function works great.. unless you use youtu.be/* without http://

Why does it not work if it is just youtu.be or www.youtu.be ?

Answer 1

This seems to work:

function getYoutubeVideoId($url) {
    $url = str_replace('http://', '', $url);
    $url = str_replace('www.', '', $url);
    $urlParts = parse_url($url);

    if($urlParts === false){
        return false;
    }

    if(strstr($urlParts['path'], 'youtu.be')){
        return str_replace('youtu.be/', '', $urlParts['path']);
    }

    if(isset($urlParts['query'])) {
        parse_str($urlParts['query'], $queryParts);

        if(isset($queryParts['v'])){
            return $queryParts['v'];
        }
    }

    return false;
}