minmax.php

<?php
    $list = array(3,4,2,5,6,7,8,2,5,1,4,4,6);

    function min_and_max($list)
    {
    	$len = count($list);
    	$minimum = $maximum = $list[0];

    	for ($i = 1; $i < $len; $i++) {
    		if ($minimum > $list[$i]) {
    			$minimum = $list[$i];
    		}
    		if ($maximum < $list[$i]) {
    			$maximum = $list[$i];
    		}
    	}

    	return array('minimum' => $minimum, 'maximum' => $maximum);
    }

    min_and_max($list);