Online PHP editor | output for pKnSk

<?php
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, $pos){
        echo "0";
        if ($board[$y][$x] != "-")
            $this->value = -1;
        else
            $this->value = 1;
    }
}
define("MAXSIZE", 100);

echo MAXSIZE;
define(P1, "r");
define(P2, "l");
define(WALL, "#");  

function nextMove($player,$pos,$board){
    $moves = array();
    array_push($moves, new Move(array($pos[0] - 1, $pos[1]), "UP", -1));
    array_push($moves, new Move(array($pos[0] + 1, $pos[1]), "DOWN", -1));
    array_push($moves, new Move(array($pos[0], $pos[1] - 1), "LEFT", -1));
    array_push($moves, new Move(array($pos[0], $pos[1] + 1), "RIGHT", -1));
    return Move::maxValDirection($moves, $board, $player, $pos)->direction;
}
    $m1 = Move::initializeEmpty();
    $m2 = new Move(array(0, 1), "RIGHT", 10);
    print_r(Move::maxValDirection(array($m1, $m2), "", "", ""));
?>

eol versions

based on 4oJnb

Output for 7.2.0: 100 Warning: Use of undefined constant P1 - assumed 'P1' (this will throw an Error in a future version of PHP) in /in/pKnSk on line 43 Warning: Use of undefined constant P2 - assumed 'P2' (this will throw an Error in a future version of PHP) in /in/pKnSk on line 44 Warning: Use of undefined constant WALL - assumed 'WALL' (this will throw an Error in a future version of PHP) in /in/pKnSk on line 45 0 Notice: Undefined variable: y in /in/pKnSk on line 34 Notice: String offset cast occurred in /in/pKnSk on line 34 Notice: Uninitialized string offset: 0 in /in/pKnSk on line 34 Notice: Undefined variable: x in /in/pKnSk on line 34 Notice: String offset cast occurred in /in/pKnSk on line 34 Notice: Uninitialized string offset: 0 in /in/pKnSk on line 34 0 Notice: Undefined variable: y in /in/pKnSk on line 34 Notice: String offset cast occurred in /in/pKnSk on line 34 Notice: Uninitialized string offset: 0 in /in/pKnSk on line 34 Notice: Undefined variable: x in /in/pKnSk on line 34 Notice: String offset cast occurred in /in/pKnSk on line 34 Notice: Uninitialized string offset: 0 in /in/pKnSk on line 34 Move Object ( [direction] => RIGHT [value] => -1 [x] => 1 [y] => 0 )
Output for 5.4.9 - 7.1.10: 100 Notice: Use of undefined constant P1 - assumed 'P1' in /in/pKnSk on line 43 Notice: Use of undefined constant P2 - assumed 'P2' in /in/pKnSk on line 44 Notice: Use of undefined constant WALL - assumed 'WALL' in /in/pKnSk on line 45 0 Notice: Undefined variable: y in /in/pKnSk on line 34 Notice: String offset cast occurred in /in/pKnSk on line 34 Notice: Uninitialized string offset: 0 in /in/pKnSk on line 34 Notice: Undefined variable: x in /in/pKnSk on line 34 Notice: String offset cast occurred in /in/pKnSk on line 34 Notice: Uninitialized string offset: 0 in /in/pKnSk on line 34 0 Notice: Undefined variable: y in /in/pKnSk on line 34 Notice: String offset cast occurred in /in/pKnSk on line 34 Notice: Uninitialized string offset: 0 in /in/pKnSk on line 34 Notice: Undefined variable: x in /in/pKnSk on line 34 Notice: String offset cast occurred in /in/pKnSk on line 34 Notice: Uninitialized string offset: 0 in /in/pKnSk on line 34 Move Object ( [direction] => RIGHT [value] => -1 [x] => 1 [y] => 0 )
Output for 5.3.19 - 5.3.29: 100 Notice: Use of undefined constant P1 - assumed 'P1' in /in/pKnSk on line 43 Notice: Use of undefined constant P2 - assumed 'P2' in /in/pKnSk on line 44 Notice: Use of undefined constant WALL - assumed 'WALL' in /in/pKnSk on line 45 0 Notice: Undefined variable: y in /in/pKnSk on line 34 Notice: Uninitialized string offset: 0 in /in/pKnSk on line 34 Notice: Undefined variable: x in /in/pKnSk on line 34 Fatal error: Cannot use string offset as an array in /in/pKnSk on line 34
Process exited with code 255.