Online PHP editor | output for mGcMQ

<?php function tep_get_subcategories($category_id) { $subcategories_raw = tep_db_query('SELECT ca.categories_id FROM categories ca LEFT JOIN categoreis cb ON ca.parent_id = cb.categories_id WHERE cb.categoreis_id = ' . (int) $category_id); $subcategories = array(); if (mysql_num_rows($subcategories_raw) >= 1) { while ($row = mysql_fetch_assoc($subcategories_raw)) { $category_id = $row['categories_id']; $subcategories[] = $category_id; } } return $subcategories; } function tep_get_leaf_categories($category_id) { $sub_categories = tep_get_subcategories($category_id); // no sub categories found:return self as result if (count($sub_categories) === 0) { return array($category_id); } else { foreach ($sub_categories as $category_id) { tep_get_leaf_categories($category_id); // what next? } } }