gistfile1.php

<?php

 class Figure // Chessboard - Rook coordinates and its motion:
 {
   private $x, $y;
   
   // setting initial position of the Rook:
    public function SetCoords($absc, $oord) {   
     if (($absc>=1 and $absc<=8) and ($oord>=1 and $oord<=8)) {   
	  $this->x = $absc;
	  $this->y = $oord;	 
	 }      
	  else echo "Coordinates out of range! The piece would fall off the board!";
    }
	
	// print current coordinates:
	public function printcords(){
	
	  echo "\n<b>X Coordinate</b>: ".$this->x ."<b> Y Coordinate</b>: ".$this->y;
	
	}
	// Rook motion:
	public function move($a, $b) {
	
	      if (($a>=1 and $a<=8) and ($b>=1 and $b<=8)) {   
              
			if ($a <> $this->x and $b <> $this->y)            
		     echo "At least one of two new coordinates should be the same as old one
			 for the Rook to make a move!";
			 
			  else if ($a = $this->x) 
				 $this->y += abs($this->y = $b);
			    else 
			   $this->x += abs($this->x - $a);
       
    	}
	
	else echo "Out of range. Your piece fell of the board lol!";
	
	}
	
	}
	 	
	$obj = new Figure();
	
	

	

 
?>