content.php

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<?php
// owner of the widget
$owner = $vars['entity']->getOwnerEntity();

$num_display = sanitize_int($vars['entity']->num_display, false);
// set default value for display number
if (!$num_display) {
    $num_display = 12;
}

// get the correct size
$size = $vars['entity']->icon_size;

if (elgg_instanceof($owner, 'user')) {
    $html = elgg_list_entities_from_relationship(array(
        'type' => 'user',
        'relationship' => 'friend',
        'relationship_guid' => $owner->guid,
        'limit' => $num_display,
        'size' => $size,
        'list_type' => 'gallery',
        'pagination' => false,
        'no_results' => elgg_echo('friends:none'),
    ));
    if ($html) {
        echo $html;
    }
}