youtube preg_替换不同的链接_Youtube_Preg Replace

youtube preg_替换不同的链接

youtube

youtube preg_替换不同的链接,youtube,preg-replace,Youtube,Preg Replace,我做了这个代码来替换youtube代码，但是我遇到了一个问题，这是我的代码 // replace video Youtube to thumbnail $string = array('http://youtube.com/watch?v=slBEtqC_JsI', 'https://youtu.be/bOxza0rLv1o'); //fix the '/' in the end of url $string = trim($string, '/'); $search =

我做了这个代码来替换youtube代码，但是我遇到了一个问题，这是我的代码

// replace video Youtube to thumbnail       
$string     = array('http://youtube.com/watch?v=slBEtqC_JsI', 'https://youtu.be/bOxza0rLv1o');
//fix the '/' in the end of url
$string = trim($string, '/');
$search = array();
$search[0] = '~(?:https://(?:www\.)?youtube\.com\/watch\?v=)?([a-zA-Z0-9_\-+?:]+)~';
$search[1] = '~(?:https://(?:www\.)?youtu\.be\/)?([a-zA-Z0-9_\-+?:]+)~';
$replace = array();
$replace[1]    = 'https://i.ytimg.com/vi/$1/hqdefault.jpg';   
$replace[0]   = 'https://i.ytimg.com/vi/$1/hqdefault.jpg'; 
$soc_youtube = preg_replace($search,$replace,$string);

代码不会更改字符串，输出将是

https://i.ytimg.com/vi/https:/hqdefault.jpg//https://i.ytimg.com/vi/i/hqdefault.jpg.https://i.ytimg.com/vi/ytimg/hqdefault.jpg.https://i.ytimg.com/vi/com/hqdefault.jpg/https://i.ytimg.com/vi/vi/hqdefault.jpg/https://i.ytimg.com/vi/https:/hqdefault.jpg/https://i.ytimg.com/vi/hqdefault/hqdefault.jpg.https://i.ytimg.com/vi/jpg/hqdefault.jpg//https://i.ytimg.com/vi/https:/hqdefault.jpg//https://i.ytimg.com/vi/i/hqdefault.jpg.https://i.ytimg.com/vi/ytimg/hqdefault.jpg.https://i.ytimg.com/vi/com/hqdefault.jpg/https://i.ytimg.com/vi/vi/hqdefault.jpg/https://i.ytimg.com/vi/youtu/hqdefault.jpg/https://i.ytimg.com/vi/hqdefault/hqdefault.jpg.https://i.ytimg.com/vi/jpg/hqdefault.jpg.https://i.ytimg.com/vi/https:/hqdefault.jpg//https://i.ytimg.com/vi/i/hqdefault.jpg.https://i.ytimg.com/vi/ytimg/hqdefault.jpg.https://i.ytimg.com/vi/com/hqdefault.jpg/https://i.ytimg.com/vi/vi/hqdefault.jpg/https://i.ytimg.com/vi/be/hqdefault.jpg/https://i.ytimg.com/vi/hqdefault/hqdefault.jpg.https://i.ytimg.com/vi/jpg/hqdefault.jpg/https://i.ytimg.com/vi/https:/hqdefault.jpg//https://i.ytimg.com/vi/i/hqdefault.jpg.https://i.ytimg.com/vi/ytimg/hqdefault.jpg.https://i.ytimg.com/vi/com/hqdefault.jpg/https://i.ytimg.com/vi/vi/hqdefault.jpg/https://i.ytimg.com/vi/bOxza0rLv1o/hqdefault.jpg/https://i.ytimg.com/vi/hqdefault/hqdefault.jpg.https://i.ytimg.com/vi/jpg/hqdefault.jpg);

有人能帮我吗？感谢您的帮助

您可以使用

'~(?:https?://(?:www\.)?youtu(?:be\.com/watch\?v=|\.be/))?([a-zA-Z0-9_\-+?:]+)/?~'

看。图案详情：

```
（？：
```
-第一个备选组的开始：
- ```
https？：/（？：www\）？youtu
```
  -
```
https://
```
  或
```
https://
```
  ，然后是可选的
```
www.
```
  子字符串，然后是
```
youtu
```
  子字符串
- ```
（？：
```
  -第二个备选组的开始：
  - ```
  be\.com/watch\？v=
```
  -
```
  be.com/watch？v=
```
  子字符串
- ```
|
```
    -或
  - ```
  \.be/
```
  -
```
  .be/
```
  子字符串
- ```
）
```
  -第二个备选组结束
```
）？
```
-1或0次
```
（[a-zA-Z0-9\-+？：]+）
```
-第1组：一个或多个单词，
```
-
```
，
```
+
```
，
```
？
```
或
```
：
```
字符
```
/？
```
-可选的
```
/
```

见：

输出：

Array
(
    [0] => https://i.ytimg.com/vi/slBEtqC_JsI/hqdefault.jpg
    [1] => https://i.ytimg.com/vi/bOxza0rLv1o/hqdefault.jpg
    [2] => https://i.ytimg.com/vi/slBEtqC_JSJ/hqdefault.jpg
)

看见

Array
(
    [0] => https://i.ytimg.com/vi/slBEtqC_JsI/hqdefault.jpg
    [1] => https://i.ytimg.com/vi/bOxza0rLv1o/hqdefault.jpg
    [2] => https://i.ytimg.com/vi/slBEtqC_JSJ/hqdefault.jpg
)