【问题标题】：PHP - Get Meta Information by EmbedURLPHP - 通过 EmbedURL 获取元信息
【发布时间】：2021-06-28 03:04:00
【问题描述】：

如何获取EmbedURL指定的元信息？我试过get_meta_tags('MY_VIDEO_URL')。但它什么也没返回。

我的 HTML：

<!--Video 1-->
        <div class="embed-responsive-item" itemprop="video" itemscope="" itemtype="http://schema.org/VideoObject">
                                      <video class="embed-responsive-item" controls="" loop="">
                            <source src="INTERNAL_VIDEO_URL">
                          </video>
                         <meta itemprop="name" content="">
                         <meta itemprop="duration" content="">
                         <meta itemprop="thumbnailUrl" content="THUMBNAIL_URL">
                         <meta itemprop="embedURL" content="INTERNAL_VIDEO_URL">
                          <meta itemprop="uploadDate" content="2021-03-27T04:10:1600Z">
            </div>
<!--Video 2-->
            <div class="embed-responsive embed-responsive-16by9" onclick="loadYoutubeVideoThroughYTApi(this)" data-src-id="player-1" data-yut-var="YOUTUBE_VIDEO_ID">
                <meta itemprop="description" content="META_DESCRIPTION_2">
                <meta itemprop="duration" content="PT1M13S">
                <meta itemprop="name" content="META_TITLE_2">
                <meta itemprop="thumbnailUrl" content="https://i.ytimg.com/vi/YOUTUBE_VIDEO_ID/maxresdefault.jpg">
               <meta itemprop="embedURL" content="https://www.youtube.com/embed/YOUTUBE_VIDEO_ID">
              <meta itemprop="uploadDate" content="2019-02-04T11:00:43.000Z">
            </div>
<!--Video 3-->
    <div class="embed-responsive-item" itemprop="video" itemscope="" itemtype="http://schema.org/VideoObject">
                                      <video class="embed-responsive-item" controls="" loop="">
                            <source src="INTERNAL_VIDEO_URL_2">
                          </video>
                         <meta itemprop="name" content="">
                         <meta itemprop="duration" content="">
                         <meta itemprop="thumbnailUrl" content="THUMBNAIL_URL_2">
                         <meta itemprop="embedURL" content="INTERNAL_VIDEO_URL_2">
                          <meta itemprop="uploadDate" content="2021-03-27T04:10:1600Z">
            </div>

如您所见，html 包含三个不同的视频，具有三个不同的元属性。所以结果数组应该是这样的

期望的输出：

    Array
    (
        [0] => Array
            (
                [url] => INTERNAL_VIDEO_URL
                [meta_name] => NULL
                [meta_description] => NULL // as you can see no meta tags for description
                [meta_duration] => NULL
                [meta_thumbnail] => THUMBNAIL_IMAGE_URL
                [upload_date] => 2021-03-27T04:10:1600Z
            )
        [1] => Array
            (
                [url] => https://www.youtube.com/embed/YOUTUBE_VIDEO_ID
                [meta_name] => META_TITLE_2
                [meta_description] => META_DESCRIPTION_2
                [meta_duration] => PT1M13S
                [meta_thumbnail] => https://i.ytimg.com/vi/YOUTUBE_VIDEO_ID/maxresdefault.jpg
                [upload_date] => 2021-03-27T04:10:1600Z
            )
        [2] => Array
            (
                [url] => INTERNAL_VIDEO_URL_2
                [meta_name] => NULL
                [meta_description] => NULL // as you can see no meta tags for description
                [meta_duration] => NULL
                [meta_thumbnail] => THUMBNAIL_IMAGE_URL_2
                [upload_date] => 2021-03-27T04:10:1600Z
            )
    )

我将如何获得这样的数组集？

【问题讨论】：

仅供参考；根据documentation get_meta_tags 需要一个文件名，而不是你想要它解析的字符串。所以这就是为什么这对你没有任何作用。
那么，我将如何获得我想要的输出？请帮忙
@AlainDoe 我已经根据您的解决方案修改了代码，并且得到了我想要的输出。
很高兴听到您设法找到解决问题的方法 ????干杯。

标签： metadata php-7

【解决方案1】：

经过这么多研究，我想出了一个解决方案，可以提供我想要的输出。

<?php
function load_my_custom_attributes_from_meta_tags( $string )
{
    
    $htmlDom = new DOMDocument();
    $errorBuffer = libxml_use_internal_errors( true );
    $htmlDom->loadHTML($string);
    libxml_clear_errors();
    libxml_use_internal_errors( $errorBuffer  );
    
    $result = Array(
            "url" => NULL,
            "meta_name" => NULL,
            "meta_description" => NULL,
            "meta_duration" => NULL,
            "meta_thumbnail" => NULL,
            "upload_date" => NULL
    );
    
    $arrayKeyMap = Array( 
        "embedURL"=>"url",
        "name"=>"meta_name",
        "description"=>"meta_description",
        "thumbnailURL"=>"meta_thumbnail",
        "duration"=>"meta_duration",
        "uploadDate"=>"upload_date"
    );
    
    $main_array = array();
    foreach ($htmlDom->getElementsByTagName("meta") as $tag) {
        $temp = Array();
        foreach ( $tag->attributes as $attribute ) {
            $temp[ $attribute->nodeName ] = $attribute->nodeValue;
        }
        if ( array_key_exists( "itemprop" , $temp ) && array_key_exists( "content" , $temp )  && array_key_exists( $temp["itemprop"] , $arrayKeyMap ) ) {
            $result[ $arrayKeyMap[ $temp["itemprop"] ] ] = $temp["content"] === "" ? NULL : $temp["content"];
            
        }
    }
    
    return $result;
}


$file_contents = file_get_contents('PAGE_URL');
preg_match_all('/<div class=\"embed-responsive\">(.*?)<\/div>/s',$file_contents,$matches);
$all_meta_properties = $matches[0];
$meta_array = array();
foreach($all_meta_properties as $video_meta) {
    $meta_array[] = load_my_custom_attributes_from_meta_tags($video_meta);
}
print_r($meta_array);
?>

【讨论】：