php中文汉字验证码程序

php   
/*   
* 文件:chinesechar.php   
* 作用:汉字数据储存   
*/   
$ChineseChar = array("人","出","来","友","学","孝","仁","义","礼","廉","忠","国","中","易","白","者","火 ","土","金","木","雷","风","龙","虎","天","地",   "生","晕","菜","鸟","田","三","百","钱","福 ","爱","情","兽","虫","鱼","九","网","新","度","哎","唉","啊","哦","仪","老","少","日",   "月 ","星");   
?>   

/*   
* 文件:check.php   
* 作用:验证   

*/   
session_start();   
$errorMSG = '';   
//验证用户输入是否和验证码一致   
if(!is_null($_POST['check']))   
{   
        if (strcasecmp($_SESSION['code'],$_POST['code'])==0)   
            $errorMSG = "

验证成功!

验证失败!

method=post>   
请输入验证码：   

   
   

/*   
* 文件:code.php   
* 作用:验证码生成   
 
* 特注:由 没牙的草 指导 版权所有转载注明出处!有付出才会有收获! 
*/   
include_once("chinesechar.php");   
session_start();   
// 设置 content-type   
header("Content-type: image/png");   
// 创建图片   
$im = imagecreatetruecolor(120, 30);   

// 创建颜色   
$fontcolor = imagecolorallocate($im, 255, 255, 255);   
$bg = imagecolorallocate($im, 0, 0, 0);   

// 设置文字   
for($i=0;$i<4;$i++) $text .= $ChineseChar[(array_rand($ChineseChar))];   

$_SESSION['code'] = $text;   
// 设置字体   
$font = 'simkai.ttf';   

// 添加文字   
imagettftext($im, 18, 0, 11, 21, $fontcolor, $font, iconv("GB2312","UTF-8",$text));   

// 输出图片   
imagepng($im);   
imagedestroy($im);   
?>