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贪吃蛇游戏是经典手机游戏，既简单又耐玩。通过控制蛇头方向吃蛋，使得蛇变长，从而获得积分。在诺基亚时代，风靡整个手机界，今天我们来看看另类的，如何使用php来实现贪吃蛇小游戏
废话不多说，代码奉上：
control.php
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<!doctype html>
<html>
<head>
<meta charset="utf-8"/>
</head>
<body>
<a href="control.php?a=up">上<a/> <?session_start(); echo $_session['count'];?>分<br/>
<a href="control.php?a=left">左<a/> <a href="control.php?a=right">右<a/><br/>
<a href="control.php?a=down">下<a/>
<?
switch($_get['a']){
case "up";
$_session['con']="up";
break;
case "down":
$_session['con']="down";
break;
case "left":
$_session['con']="left";
break;
case "right":
$_session['con']="right";
break;
}
?>
</body>
</html>
main.php
<!doctype html>
<html>
<head>
<meta charset="utf-9"/>
<meta http-equiv="refresh" content="0.5"/>
</head>
<frameset rows="95,*" border="1" noresize >
<frame src="control.php" name="top"/>
<frame src="./tcs.php" name="menu"/>
</frameset>
</html>
tcs.php
<?php
session_start();
$_session['ud'];
$_session['lr'];
$im = imagecreatetruecolor(300,300);
$blue = imagecolorallocate($im,0,0,255);
$red = imagecolorallocate($im,255,0,0);
$c1 = imagecolorallocate($im,200,200,200);
imagefill($im,0,0,$c1);
if(!isset($_session['a'])&&!isset($_session['b'])){
$_session['a'] =rand(0,290);
$_session['b'] =rand(0,290);
}
if(isset($_session['a'])&&isset($_session['b'])){
imagerectangle($im,$_session['a'],$_session['b'],$_session['a']+10,$_session['b']+10,$red);
}
if(abs(($_session['lr']-$_session['a']))<=5&&abs($_session['ud']-$_session['b'])<=5){
unset($_session['a']);
unset($_session['b']);
$_session['count']++;
}
switch($_session['con']){
case "up";
if($_session['ud']>10)
$_session['ud']-=10;
else
$_session['ud']=0;
break;
case "down":
if($_session['ud']<=280)
$_session['ud']+=10;
else
$_session['ud']=290;
break;
case "left":
if($_session['lr']>10)
$_session['lr']-=10;
else
$_session['lr']=0;
break;
case "right":
if($_session['lr']<=280)
$_session['lr']+=10;
else
$_session['lr']=290;
break;
}
for($i=0;$i<=$_session['count'];$i++){
switch($_session['con']){
case "up":
$_session['udnext'] = $_session['ud']+10*$i;
imagerectangle($im,$_session['lr'],$_session['udnext'],$_session['lr']+10,$_session['udnext']+10,$blue);
// imagerectangle($im,$_session['lr'],$_session['udtime'][time()-$i],$_session['lr']+10,$_session['udtime'][time()-$i]+10,$blue);
break;
case "down":
$_session['udnext'] = $_session['ud']-10*$i;
imagerectangle($im,$_session['lr'],$_session['udnext'],$_session['lr']+10,$_session['udnext']+10,$blue);
// imagerectangle($im,$_session['lr'],$_session['udtime'][time()+$i],$_session['lr']+10,$_session['udtime'][time()+$i]+10,$blue);
break;
case "left":
$_session['lrnext'] = $_session['lr']+10*$i;
imagerectangle($im,$_session['lrnext'],$_session['ud'],$_session['lrnext']+10,$_session['ud']+10,$blue);
// imagerectangle($im,$_session['lrtime'][time()-$i],$_session['ud'],$_session['lrtime'][time()-$i]+10,$_session['ud']+10,$blue);
break;
case "right":
$_session['lrnext'] = $_session['lr']-10*$i;
imagerectangle($im,$_session['lrnext'],$_session['ud'],$_session['lrnext']+10,$_session['ud']+10,$blue);
// imagerectangle($im,$_session['lrtime'][time()+$i],$_session['ud'],$_session['lrtime'][time()+$i]+10,$_session['ud']+10,$blue);
break;
}
//imagerectangle($im,$_session['lr'],$_session['ud'],$_session['lr']+10,$_session['ud']+10,$blue);
}
header("content-type: image/jpeg");
imagejpeg($im);
imagedestroy($im);
?>
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