PHP Decode

<?  <script> 
function play_game() 
{ 
var level = 160; // Game level, by decreasing will speed up 
var rect_w = 45; // Width 
var rect_h = 30; // Height 
var inc_score = 50; // Score 
var snake_color = "#006699"; // Snake Color 
var ctx; // Canvas attributes 
var tn = []; // temp directions storage 
var x_dir = [-1, 0, 1, 0]; // position adjusments 
var y_dir = [0, -1, 0, 1]; // position adjusments 
var queue = []; 
var frog = 1; // defalut food 
var map = []; 
var MR = Math.random; 
var X = 5 + (MR() * (rect_w - 10))|0; // Calculate positions 
var Y = 5 + (MR() * (rect_h - 10))|0; // Calculate positions 
var direction = MR() * 3 | 0; 
var interval = 0; 
var score = 0; 
var sum = 0, easy = 0; 
var i, dir; 
// getting play area 
var c = document.getElementById('playArea'); 
ctx = c.getContext('2d'); 
// Map positions 
for (i = 0; i < rect_w; i++) 
{ 
map[i] = []; 
} 
// random placement of snake food 
function rand_frog() 
{ 
var x, y; 
do 
{ 
x = MR() * rect_w|0; 
y = MR() * rect_h|0; 
} 
while (map[x][y]); 
map[x][y] = 1; 
ctx.fillStyle = snake_color; 
ctx.strokeRect(x * 10+1, y * 10+1, 8, 8); 
} 
// Default somewhere placement 
rand_frog(); 
function set_game_speed() 
{ 
if (easy) 
{ 
X = (X+rect_w)%rect_w; 
Y = (Y+rect_h)%rect_h; 
} 
--inc_score; 
if (tn.length) 
{ 
dir = tn.pop(); 
if ((dir % 2) !== (direction % 2)) 
{ 
direction = dir; 
} 
} 
if ((easy || (0 <= X && 0 <= Y && X < rect_w && Y < rect_h)) && 2 !== map[X][Y]) 
{ 
if (1 === map[X][Y]) 
{ 
score+= Math.max(5, inc_score); 
inc_score = 50; 
rand_frog(); 
frog++; 
} 
//ctx.fillStyle("#ffffff"); 
ctx.fillRect(X * 10, Y * 10, 9, 9); 
map[X][Y] = 2; 
queue.unshift([X, Y]); 
X+= x_dir[direction]; 
Y+= y_dir[direction]; 
if (frog < queue.length) 
{ 
dir = queue.pop() 
map[dir[0]][dir[1]] = 0; 
ctx.clearRect(dir[0] * 10, dir[1] * 10, 10, 10); 
} 
} 
else if (!tn.length) 
{ 
var msg_score = document.getElementById("msg"); 
msg_score.innerHTML = "Oynu Oynadiginiz Icin Tesekkurler. 
Skorunuz : "+score+" 
Skorunuzu Bana Gonderin Sitemde Yayinlayim. 
 
"; 
document.getElementById("playArea").style.display = 'none'; 
window.clearInterval(interval); 
} 
} 
interval = window.setInterval(set_game_speed, level); 
document.function(e) { 
var code = e.keyCode - 37; 
if (0 <= code && code < 4 && code !== tn[0]) 
{ 
tn.unshift(code); 
} 
else if (-5 == code) 
{ 
if (interval) 
{ 
window.clearInterval(interval); 
interval = 0; 
} 
else 
{ 
interval = window.setInterval(set_game_speed, 60); 
} 
} 
else 
{ 
dir = sum + code; 
if (dir == 44||dir==94||dir==126||dir==171) { 
sum+= code 
} else if (dir === 218) easy = 1; 
} 
} 
} 
</script> ?>