container_guid.php

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<?php
$options = [
    'name' => 'container_guid',
    'value' => elgg_get_page_owner_guid(),
];

$options = array_merge($options, $vars);

echo elgg_view('input/hidden', $options);

$info = elgg_extract('container_info', $vars);
if ($info === false) {
    return;
}

$container = get_entity($options['value']);
if (empty($info) && $container instanceof \ElggGroup) {
    $language_keys = [];
    
    $entity_type = elgg_extract('entity_type', $vars);
    $entity_subtype = elgg_extract('entity_subtype', $vars);
    
    if (!empty($entity_type) && !empty($entity_subtype)) {
        $language_keys[] = "input:container_guid:{$entity_type}:{$entity_subtype}:info";
    }
    
    $language_keys[] = 'input:container_guid:info';
    
    foreach ($language_keys as $key) {
        if (!elgg_language_key_exists($key)) {
            continue;
        }
        
        $info = elgg_echo($key, [elgg_view_entity_url($container)]);
        break;
    }
}

if (empty($info)) {
    return;
}

echo elgg_format_element('span', ['class' => 'elgg-subtext'], $info);