2013 HackerRank BotClean Stochastic.php

<?php
function nextMove($_y, $_x, $b) {
    foreach ($b AS $y=>$l)
        foreach (str_split(trim($l)) AS $x=>$p)
            if ($p=='d') {
                if      ($_x<$x) $a = 'RIGHT';
                else if ($_x>$x) $a = 'LEFT';
                else if ($_y<$y) $a = 'DOWN';
                else if ($_y>$y) $a = 'UP';
                else             $a = 'CLEAN';
                $dirt[(abs($x-$_x)+abs($y-$_y))] = $a;
            }
    
    ksort($dirt);
    echo current($dirt);
}





///// HackerRank:
$fp = fopen("php://stdin", "r");
$temp = fgets($fp);
$position = split(' ',$temp);
$board = array();
for ($i=0;$i<5;$i++) {
    fscanf($fp, "%s", $board[$i]);
}
nextMove($position[0], $position[1], $board);