PHP get_meta_tags() funktioniert nicht wie ich erwartet hatte

Question

ich Meta-Tags erhalten wollte (Speziell og: Titel, og: Beschreibung und og: image) ...

Ich verwende folgenden Code,

$tags = get_meta_tags('https://www.shoutmeloud.com/review-of-hostgator-webhosting-wordpress.html/'); 
echo "<pre>"; 
print_r($tags); 

es gibt folgende Array

Array 
(
    [viewport] => width=device-width, initial-scale=1 
    [description] => Check out HostGator review for year 2017. This review if written after using Hostgator for 5 years. Is Hostgator Good hosting? Find out answer here 
    [twitter:card] => summary_large_image 
    [twitter:description] => Check out HostGator review for year 2017. This review if written after using Hostgator for 5 years. Is Hostgator Good hosting? Find out answer here 
    [twitter:title] => A Blogger Review of HostGator Shared Hosting Plan 
    [twitter:site] => @shoutmeloud 
    [twitter:image] => https://www.shoutmeloud.com/wp-content/uploads/2014/08/Review-of-Hostgator-Shared-Hosting-Plan.jpg 
    [twitter:creator] => @denharsh 
    [generator] => Easy Digital Downloads v2.8.14 
    [msapplication-tileimage] => https://www.shoutmeloud.com/wp-content/uploads/2017/12/cropped-favicon-270x270.png 
) 

PHPFidlle: http://phpfiddle.org/main/code/qe22-3r5n

Warum es nicht Tags zurückkehren wie og:title, og:description and og:image sogar ihre sind im Quellcode dieser URL. Wie behebe ich dieses Problem?

Answer 1

Das ist, weil get_meta_tags das name Attribut sucht.

Der Wert der Name Eigenschaft wird den Schlüssel

alle Tags Sie suchen, werden unter dem property Attribute aufgeführt. Wenn Sie der Eigentümer der Quellseite sind, können Sie einfach das Attribut name zu den Elementen mit demselben Wert wie das Attribut property hinzufügen.

Wenn nicht, dann könnten Sie etwas wie DOMDocument in Verbindung mit file_get_contents oder curl verwenden, um die spezifischen Werte zu erhalten, an denen Sie interessiert sind.

Zum Beispiel:

<?php 
$content = file_get_contents('https://www.shoutmeloud.com/review-of-hostgator-webhosting-wordpress.html'); 

$doc = new DOMDocument(); 

// squelch HTML5 errors 
@$doc->loadHTML($content); 

$meta = $doc->getElementsByTagName('meta'); 
foreach ($meta as $element) { 
    $tag = []; 
    foreach ($element->attributes as $node) { 
     $tag[$node->name] = $node->value; 
    } 
    $tags []= $tag; 
} 

print_r($tags); 

Ergebnisse in:

Array 
(
    [0] => Array 
     (
      [charset] => UTF-8 
     ) 

    [1] => Array 
     (
      [name] => viewport 
      [content] => width=device-width, initial-scale=1 
     ) 

    [2] => Array 
     (
      [name] => description 
      [content] => Check out HostGator review for year 2017. This review if written after using Hostgator for 5 years. Is Hostgator Good hosting? Find out answer here 
     ) 

    [3] => Array 
     (
      [property] => og:locale 
      [content] => en_US 
     ) 

    [4] => Array 
     (
      [property] => og:type 
      [content] => article 
     ) 

    [5] => Array 
     (
      [property] => og:title 
      [content] => A Blogger Review of HostGator Shared Hosting Plan 
     ) 

    [6] => Array 
     (
      [property] => og:description 
      [content] => Check out HostGator review for year 2017. This review if written after using Hostgator for 5 years. Is Hostgator Good hosting? Find out answer here 
     ) 

    [7] => Array 
     (
      [property] => og:url 
      [content] => https://www.shoutmeloud.com/review-of-hostgator-webhosting-wordpress.html 
     ) 

    [8] => Array 
     (
      [property] => og:site_name 
      [content] => ShoutMeLoud 
     ) 

    [9] => Array 
     (
      [property] => article:publisher 
      [content] => https://www.facebook.com/shoutmeloud 
     ) 

    [10] => Array 
     (
      [property] => article:author 
      [content] => https://www.facebook.com/denharsh 
     ) 

    [11] => Array 
     (
      [property] => article:tag 
      [content] => hostgator 
     ) 

    [12] => Array 
     (
      [property] => article:tag 
      [content] => Review 
     ) 

    [13] => Array 
     (
      [property] => article:tag 
      [content] => Wordpress Webhosting 
     ) 

    [14] => Array 
     (
      [property] => article:section 
      [content] => Webhosting 
     ) 

    [15] => Array 
     (
      [property] => article:published_time 
      [content] => 2016-08-18T15:51:46+05:30 
     ) 

    [16] => Array 
     (
      [property] => article:modified_time 
      [content] => 2017-11-29T23:50:31+05:30 
     ) 

    [17] => Array 
     (
      [property] => og:updated_time 
      [content] => 2017-11-29T23:50:31+05:30 
     ) 

    [18] => Array 
     (
      [property] => fb:admins 
      [content] => 100000563323286 
     ) 

    [19] => Array 
     (
      [property] => og:image 
      [content] => https://www.shoutmeloud.com/wp-content/uploads/2014/08/Review-of-Hostgator-Shared-Hosting-Plan.jpg 
     ) 

    [20] => Array 
     (
      [property] => og:image:secure_url 
      [content] => https://www.shoutmeloud.com/wp-content/uploads/2014/08/Review-of-Hostgator-Shared-Hosting-Plan.jpg 
     ) 

    [21] => Array 
     (
      [name] => twitter:card 
      [content] => summary_large_image 
     ) 

    [22] => Array 
     (
      [name] => twitter:description 
      [content] => Check out HostGator review for year 2017. This review if written after using Hostgator for 5 years. Is Hostgator Good hosting? Find out answer here 
     ) 

    [23] => Array 
     (
      [name] => twitter:title 
      [content] => A Blogger Review of HostGator Shared Hosting Plan 
     ) 

    [24] => Array 
     (
      [name] => twitter:site 
      [content] => @shoutmeloud 
     ) 

    [25] => Array 
     (
      [name] => twitter:image 
      [content] => https://www.shoutmeloud.com/wp-content/uploads/2014/08/Review-of-Hostgator-Shared-Hosting-Plan.jpg 
     ) 

    [26] => Array 
     (
      [name] => twitter:creator 
      [content] => @denharsh 
     ) 

    [27] => Array 
     (
      [name] => generator 
      [content] => WordPress 4.9.1 
     ) 

    [28] => Array 
     (
      [name] => generator 
      [content] => Easy Digital Downloads v2.8.14 
     ) 

    [29] => Array 
     (
      [property] => fb:pages 
      [content] => 94019601674 
     ) 

    [30] => Array 
     (
      [name] => msapplication-TileImage 
      [content] => https://www.shoutmeloud.com/wp-content/uploads/2017/12/cropped-favicon-270x270.png 
     ) 

    [31] => Array 
     (
      [content] => Hostgator 
      [itemprop] => name 
     ) 

    [32] => Array 
     (
      [content] => 1 
      [itemprop] => worstRating 
     ) 

    [33] => Array 
     (
      [content] => 4.5 
      [itemprop] => ratingValue 
     ) 

    [34] => Array 
     (
      [content] => 5 
      [itemprop] => bestRating 
     ) 

    [35] => Array 
     (
      [content] => Hostgator 
      [itemprop] => name 
     ) 

)