从WordPress中的当前页面获取所有附件 _WordPress开发

我尝试从当前的wordpress页面获取所有附件。但是我的代码仅向我显示了第一个结果。有什么问题？
我的密码

< ?php $attachments = get_children(array( 'post_parent' => $post-> ID, 'post_status' => 'any', 'post_type' => 'attachment', 'post_mime_type' => 'image' ) ); foreach($attachments as $att_id => $attachment) { if (get_post_meta( $attachment-> ID, '_bildnachweis', true )) { $full_img_caption = get_post_meta( $attachment-> ID, '_bildnachweis', true ); echo $full_img_caption; // Here I need more results, but the browser shows me only one. } } ?>

【从WordPress中的当前页面获取所有附件】echo $ full_img_caption; 仅显示一个结果, 而不显示该页面的三个现有图像。我的foreach循环有问题吗？
#1我认为你应该在这一行中使用false而不是true：get_post_meta($ attachment-> ID, ‘ _bildnachweis’ , true)以获取所有值。 true将仅返回第一个值。 https://developer.wordpress.org/reference/functions/get_post_meta/
#2我找到了一种可行的方法：

< ?php //This will return the HTML source of the page as a string. $htmlString = $post-> post_content; //Create a new DOMDocument object. $htmlDom = new DOMDocument; //Load the HTML string into our DOMDocument object. @$htmlDom-> loadHTML($htmlString); //Extract all img elements / tags from the HTML. $imageTags = $htmlDom-> getElementsByTagName('img'); //Create an array to add extracted images to. $extractedImages = array(); //Loop through the image tags that DOMDocument found. foreach($imageTags as $imageTag){//Get the alt text of the image. $classText = $imageTag-> getAttribute('class'); //Add the image details to our $extractedImages array. $extractedImages[] = array( 'class' => $classText ); }?> < div id="image-copyright" class="container"> < strong> Bildnachweis:< /strong> < ?php foreach($extractedImages as $image) { $unsplittedImage = $image["class"]; $imageID = explode("wp-image-", $unsplittedImage)[1]; $full_img_caption = get_post_meta( $imageID, '_bildnachweis', true ); if ($full_img_caption) { echo "< span class='single-author'> ". $full_img_caption ."< /span> "; } ?> < ?php } ?> < /div>