Menu callback; Retrieve a JSON object containing autocomplete suggestions for existing users.
function user_autocomplete($string = '') {
$matches = array();
if ($string) {
$result = db_select('users')
->fields('users', array(
'name',
))
->condition('name', db_like($string) . '%', 'LIKE')
->range(0, 10)
->execute();
foreach ($result as $user) {
$matches[$user->name] = check_plain($user->name);
}
}
drupal_json_output($matches);
}