View file imagesearch/valid.php

<?php
$safe = array("off", "moderate", "active");
$image_size = array('', 'icon', 'small', 'medium', 'large', 'xlarge', 'xxlarge', 'huge');
$image_type = array('', 'jpg', 'png', 'gif', 'bmp');
$s = array('ocean', 'flowers', 'nature', 'taylor swift');
shuffle($s);