Get all attachments from current page in Wordpress - php

Question

I try to get all attachments from a current wordpress page. But my code only shows me the first result. What´s the issue?
My code
<?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.
}
}
?>
echo $full_img_caption; shows me only one result instead of three existing images for the page. There is a problem with my foreach loop?

Answer 1

I think you should use false instead of true in this line: get_post_meta( $attachment->ID, '_bildnachweis', true ) to get all values. true will only return the first value. https://developer.wordpress.org/reference/functions/get_post_meta/

Answer 2

I found a way that works:
<?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>