php中文汉字验证码程序_PHP教程

/*
* 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!

/*
* 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);
?>