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PHP实例:PHP汉字验证码的实现

点击次数:1411  更新日期:2011-01-04
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<?php
/*
* 文件:chinesechar.php
* 作用:汉字数据储存
* 作者:PHP实战群:33918040 – 鱼尾唯一
* 网址:http://bbs.ailf.cn/ http://www.fishwei.com/
* 特注:版权所有转载注明出处!有付出才会有收获!
*/
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”);
?>


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<?php
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>


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<?php
include_once(“chinesechar.php”);
session_start();
// 设置 content-type
header(“Content-type: image/png”);
// 创建图片
im = imagecreatetruecolor(120, 30);


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


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


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


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


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


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