Php 如何从此Url提取YouTube ID

如何从该URL提取YouTube ID

https%253A%252F%252Fwww.youtube.com%252Fwatch%253Fv%253Dnn5hCEMyE-E

我试过这个正则表达式：

$url = $_GET["q"];
preg_match("/^(?:http(?:s)?:\/\/)?(?:www\.)?(?:m\.)?(?:youtu\.be\/|youtube\.com\/(?:(?:watch)?\?(?:.*&)?v(?:i)?=|(?:embed|v|vi|user)\/))([^\?&\"'>]+)/", $url, $matches);

尝试此操作（在将其传递给函数之前，不要忘记生成

urldecode（rawurldecode（$url））

）

---

首先对其进行解码，然后使用数组

匹配项的第二个索引（
[1]
）：

if(isset($_GET["q"]))
{
    $url = urldecode(rawurldecode($_GET["q"]));
    # https://www.youtube.com/watch?v=nn5hCEMyE-E
    preg_match("/^(?:http(?:s)?:\/\/)?(?:www\.)?(?:m\.)?(?:youtu\.be\/|youtube\.com\/(?:(?:watch)?\?(?:.*&)?v(?:i)?=|(?:embed|v|vi|user)\/))([^\?&\"'>]+)/", $url, $matches);
    echo $matches[1];
    # nn5hCEMyE-E
}

if(isset($_GET["q"]))
{
    $url = urldecode(rawurldecode($_GET["q"]));
    # https://www.youtube.com/watch?v=nn5hCEMyE-E
    preg_match("/^(?:http(?:s)?:\/\/)?(?:www\.)?(?:m\.)?(?:youtu\.be\/|youtube\.com\/(?:(?:watch)?\?(?:.*&)?v(?:i)?=|(?:embed|v|vi|user)\/))([^\?&\"'>]+)/", $url, $matches);
    echo $matches[1];
    # nn5hCEMyE-E
}