master/friendspicker_8php_source.html

 <?php
 if (!isset($vars['name'])) {
     $vars['name'] = 'friend';
 }

 $vars['only_friends'] = true;

 echo elgg_view('input/userpicker', $vars);
elgg_view
elgg_view(string $view, array $vars=[], string $viewtype= '')
Return a parsed view.
Definition: views.php:156

$vars
if(!isset($vars['name'])) $vars['only_friends']
Elgg friends picker.
Definition: friendspicker.php:12