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@ 2015-11-21T11:15:47Z

<?php
    
class Pos {
    var $x;
    var $y;
    
    public function __construct($x, $y){
        $this->x = $x;
        $this->y = $y;
    }
}
    
class Move {
    var $direction;
    var $value;
    var $x;
    var $y;

    public static function initializeEmpty(){
        return (new Move(array(0, 0), "NONE", -1));
    }
    
	public function __construct($pos, $direction, $value){
		$this->y = $pos[0];
		$this->x = $pos[1];
		$this->value = $value;
		$this->direction = $direction;
	}
    
    public function compare($move){
        return $move->value > $this->value ? $move : $this;
    }
    
    public static function maxValDirection($moves, $board, $player, $pos){
        $best = Move::initializeEmpty();
        foreach($moves as $m){
            $m->setValue($board, $player, $pos);
            $best = $m->compare($best);
        }
        return $best;
    }
    
    public function setValue($board, $player, $pos){
        if ($board[$this->y][$this->x] != CLEAR)
            $this->value = -10;
        else
            $this->value = 1;
    }
}

define("CLEAR", chr(45));
define("P1", chr(114));
define("P2", chr(103));
define("WALL", chr(35));

function nextMove($player,$pos,$board){
    $moves = array();
    array_push($moves, new Move(new Pos($pos->x, $pos->y - 1), "UP", -1));
    array_push($moves, new Move(new Pos($pos->x, $pos->y + 1), "DOWN", -1));
    array_push($moves, new Move(new Pos($pos->x - 1, $pos->y), "LEFT", -1));
    array_push($moves, new Move(new Pos($pos->x + 1, $pos->y), "RIGHT", -1));
    return Move::maxValDirection($moves, $board, $player, $pos)->direction;
}

function getPlayerPos($player, $pos){
    return ord($player) == ord(P1) ? new Pos($pos[1], $pos[0]) : new Pos($pos[3], $pos[2]);
}



    $m1 = Move::initializeEmpty();
    $m2 = new Move(array(0, 1), "RIGHT", 10);
    print_r(Move::maxValDirection(array($m1, $m2), "", "", ""));
?>

Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: Warning: Uninitialized string offset 0 in /in/Kkrt6 on line 44 Warning: Uninitialized string offset 0 in /in/Kkrt6 on line 44 Warning: Uninitialized string offset 0 in /in/Kkrt6 on line 44 Warning: Uninitialized string offset 1 in /in/Kkrt6 on line 44 Move Object ( [direction] => NONE [value] => -1 [x] => 0 [y] => 0 )
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Warning: Uninitialized string offset 0 in /in/Kkrt6 on line 44 Warning: Uninitialized string offset 0 in /in/Kkrt6 on line 44 Warning: Uninitialized string offset 0 in /in/Kkrt6 on line 44 Warning: Uninitialized string offset 1 in /in/Kkrt6 on line 44 Move Object ( [direction] => NONE [value] => -1 [x] => 0 [y] => 0 )
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33: Notice: Uninitialized string offset: 0 in /in/Kkrt6 on line 44 Notice: Uninitialized string offset: 0 in /in/Kkrt6 on line 44 Notice: Uninitialized string offset: 0 in /in/Kkrt6 on line 44 Notice: Uninitialized string offset: 1 in /in/Kkrt6 on line 44 Move Object ( [direction] => NONE [value] => -1 [x] => 0 [y] => 0 )
Output for 7.3.32 - 7.3.33: Move Object ( [direction] => NONE [value] => -1 [x] => 0 [y] => 0 )

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