php中文汉字验证码程序

代码如下

复制代码

<?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");
?>

<?php
/*
* 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 = "<p style="font-size:12px;color:#009900">验证成功!</p>";
        else
            $errorMSG = "<p style="font-size:12px;color:#FF0000">验证失败!</p>";
}
?>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<body>
<?php
if($errorMSG){
echo $errorMSG;
}
?>
<form action=<?php echo $_SERVER['PHP_SELF']?> method=post>
请输入验证码：<input type="text" name="code" style="width:
80px"><img src="code.php">
<br>
<input type="submit" name="check" value="提交验证码">
</form>
</body>
</html>

<?php
/*
* 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);
?>

如果想把上面的程序改成英文数字，只要在chinesechar.php 里面的数组中文改成数字或字母就KO了。

补充：Php教程,Php安全