解析PHP汉字验证码的实现

发布时间：2022-07-07 13:02 所属栏目：121 来源：互联网

　　<?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");

　　?>

　　<?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>

　　<?php

　　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);

　　?>.

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