如何从iframe获取id？ [英] How to get the id from iframe?

问题描述

我想从iframe获取youtube id。并使用此链接进行此链接提供的正则表达式此处

I am tring to get the youtube id from the iframe. And using this link for regular expression given by this link here

我正在使用此代码，但得到数组（0）{}结果。这是代码：

I am using this code but getting the array(0){} result. Here is the code:

`

    preg_match('/src="\/\/(?:https?:\/\/)?.*\/(.*?)\?rel=\d*"/',$urldd, $matches);

     var_dump($matches);
        echo $matches[0][0];`

我使用preg_match很差所以任何人都可以帮助我正确地从iframe获取youtube id。

I am poor in using preg_match so please can anyone help me to get the youtube id from iframe properly.

推荐答案

或者，您也可以使用 DOMDocument 获取该特定网址，然后使用 parse_url（）。示例代码：

Alternatively, you can also use DOMDocument to get that particular url, then use parse_url(). Sample Code:

$html = '<iframe width="560" height="315" src="//www.youtube.com/embed/0gugBiEkLwU?rel=0" frameborder="0" allowfullscreen></iframe>';
$dom = new DOMDocument();
$dom->loadHTML($html);
$iframe = $dom->getElementsByTagName('iframe');
$url = '';
foreach($iframe as $tag) {
    $url = $tag->getAttribute('src');
}
$output = parse_url($url, PHP_URL_PATH);
$pieces = array_filter(explode('/', $output));
$id = end($pieces);

// Should output 0gugBiEkLwU

如果你坚持使用正则表达式，你可以做这样的事情：

If you insist to use regex, you could do something like this:

$pattern = '#(?<=(?:v|i)=)[a-zA-Z0-9-]+(?=&)|(?<=(?:v|i)\/)[^&\n]+|(?<=embed\/)[^"&\n]+|(?<=‌​(?:v|i)=)[^&\n]+|(?<=youtu.be\/)[^&\n]+#';
$html = '<iframe width="560" height="315" src="//www.youtube.com/embed/0gugBiEkLwU?rel=0" frameborder="0" allowfullscreen></iframe>';
preg_match($pattern, $html, $matches);
$url = reset($matches);
$url = strtok($url, '?');
echo $url; // 0gugBiEkLwU

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