Ok, after much gnashing of teeth and sighing I finally got something that worked. Immediately the problem is that wp_get_attachment_metadata is for something else. I wanted wp_get_attachment
Function:
function wp_get_attachment( $attachment_id ) {
$attachment = get_post( $attachment_id );
return array(
'alt' => get_post_meta( $attachment->ID, '_wp_attachment_image_alt', true ),
'caption' => $attachment->post_excerpt,
'description' => $attachment->post_content,
'href' => get_permalink( $attachment->ID ),
'src' => $attachment->guid,
'title' => $attachment->post_title
);
}
Useage:
<?php
$attachment = wp_get_attachment( get_field( 'primary_image' ) );
echo $attachment['caption'];
?>
