php 5 "closure"

gistfile1.aw

<?php


function courses_db_form_alter(&$form, $form_state, $form_id) {
  if ($form['#id'] == 'views-exposed-form-catalog-listings-page' && $form_id == 'views_exposed_form') {
    $max_comparator = function ($max) {
      return function ($v) use ($max) { return (intval($v) > 0) ? $v < $max : TRUE; };
    };
    # this form value starts with "--Any--", we want to inlcude that always.
    $form['field_coursedb_year_tid']['#options'] =
        array_filter(
          $form['field_coursedb_year_tid']['#options'],
          $max_comparator(variable_get('current_schoolyear', 2012))
        );
  }
}