stoimen

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

    function maximum($list) 
    {
    	$len = count($list);
    	$maximum = $list[0];
    	
    	for ($i = 1; $i &lt; $len; $i++) {
    		if ($maximum &lt; $list[$i]) {

stoimen

<?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]) {

stoimen

<?php

function min_and_max($list) 
{
	$len = count($list);
	$minimum = $maximum = $list[0];
	
	// adding a centinel
	if ($len % 2 == 0) {
		$list[] = $list[0];

stoimen

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

	$start = 1;
	if (!($len & 1)) {
		$start = 0;
	}

stoimen

[a, b] = [b, a]