comments.php

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<?php
$show_add_form = elgg_extract('show_add_form', $vars, true);
$full_view = elgg_extract('full_view', $vars, true);
$limit = elgg_extract('limit', $vars, get_input('limit', 0));
if (!$limit) {
    $limit = elgg_trigger_plugin_hook('config', 'comments_per_page', [], 25);
}

$attr = [
    'id' => elgg_extract('id', $vars, 'comments'),
    'class' => (array) elgg_extract('class', $vars, []),
];
$attr['class'][] = 'elgg-comments';

// work around for deprecation code in elgg_view()
unset($vars['internalid']);

$content = elgg_list_entities(array(
    'type' => 'object',
    'subtype' => 'comment',
    'container_guid' => $vars['entity']->guid,
    'reverse_order_by' => true,
    'full_view' => true,
    'limit' => $limit,
    'preload_owners' => true,
    'distinct' => false,
    'url_fragment' => $attr['id'],
));

if ($show_add_form) {
    $content .= elgg_view_form('comment/save', array(), $vars);
}

echo elgg_format_element('div', $attr, $content);