（二）ZendFramework之验证码
增加CaptchaController 实现验证码功能
1 修改App/config/resource.ini
captcha = default:captcha
2 修改library/common/pluin/myacl.php
$this->allow('guest' ,'default:captcha' ,array('index' ));
以上两步是增加访问权限,否则控制器无法识别。
3 修改前台模板link.php
<img id="imgcode" style="margin-bottom:-5px;cursor:pointer;" onclick="javascript:ChangImg()" src="<?= $this->makeurl('captcha' ,'index' );?> ">
<script type="text/javascript" language="Javascript" >
function ChangImg()
{
var checkcode = $("#imgcode").get(0);
var dt = new Date();
checkcode.src = "<?= $this->makeurl('captcha' ,'index' );?> ";
}
</script>
4 新建 /app/modules/default/controllers/CaptchaController.php
<?php
require('CommonController.php');
class CaptchaController extends CommonController
{
function init() {
// 执行父类中的构造函数
parent::init();
}
/**
* 链接首页
*
*/
public function indexAction()
{
Zend_Loader::loadClass('Common_Plugin_MyCaptcha');
$myCaptcha = new Common_Plugin_MyCaptcha();
$myCaptcha->image();//生成图像
}
}
5 提交后的验证判断
<input name="imagecode" id="imagecode" class="input" value="" size="20" tabindex="20" type="text"></label>
if ($this->_request->isPost())
{
//登陆验证
$filter = new Zend_Filter_StripTags();
require_once 'Zend/Session/Namespace.php' ;
$imagecode = $filter->filter($this->_request->getPost('imagecode' ));
$authCode = new Zend_Session_Namespace('Auth_Code' );// 读取命名的空间
if ($authCode->imagecode!=$imagecode)
{
$this->view->error = " 验证码不正确 !";
echo $this->view->render('login.php' );
exit;
}
}
最后附上MyCaptcha.php
<?php
/**
* 生成图像验证码
*
* 代码来自 ThinkPHP 的 Lib/ORG/Util/Image.class.php 文件，特此对 ThinkPHP 团队表示感谢
*
* Custom
*
* LICENSE:
*
* @category Common
* @package Plugin
* @copyright Copyright (c) PConline
* @license
* @version
*/
/**
* Zend_Controller_Plugin_Abstract
*/
require_once 'Zend/Controller/Plugin/Abstract.php';
require_once 'Zend/Session/Namespace.php';
class Common_Plugin_MyCaptcha extends Zend_Controller_Plugin_Abstract
{
/**
* 生成图像验证码
*
* @param string $length 验证码长度
* @param string $mode 类型
* @param string $type 图像格式
* @param string $width 图像宽度
* @param string $height 图像高度
* @return string
*/
function image($length=4,$mode=1,$type='png',$width=40,$height=20)
{
$randval = $this->rand_string($length,$mode);
$authCode = new Zend_Session_Namespace('Auth_Code');//命名空间
$authCode->imagecode = $randval;
$width = ($length*9+10)>$width?$length*9+10:$width;
if ( $type!='gif' && function_exists('imagecreatetruecolor')) {
$im = @imagecreatetruecolor($width,$height);
}else {
$im = @imagecreate($width,$height);
}
$r = Array(225,255,255,223);
$g = Array(225,236,237,255);
$b = Array(225,236,166,125);
$key = mt_rand(0,3);
// 背景色（随机）
$backColor = imagecolorallocate($im, $r[$key],$g[$key],$b[$key]);
// 边框色
$borderColor = imagecolorallocate($im, 100, 100, 100);
// 点颜色
$pointColor = imagecolorallocate($im,mt_rand(0,255),mt_rand(0,255),mt_rand(0,255));
@imagefilledrectangle($im, 0, 0, $width - 1, $height - 1, $backColor);
@imagerectangle($im, 0, 0, $width-1, $height-1, $borderColor);
$stringColor = imagecolorallocate($im,mt_rand(0,200),mt_rand(0,120),mt_rand(0,120));
// 干扰
for($i=0;$i<10;$i++){
$fontcolor = imagecolorallocate($im,mt_rand(0,255),mt_rand(0,255),mt_rand(0,255));
imagearc($im,mt_rand(-10,$width),mt_rand(-10,$height),mt_rand(30,300),mt_rand(20,200),55,44,$fontcolor);
}
for($i=0;$i<25;$i++){
$fontcolor = imagecolorallocate($im,mt_rand(0,255),mt_rand(0,255),mt_rand(0,255));
imagesetpixel($im,mt_rand(0,$width),mt_rand(0,$height),$pointColor);
}
@imagestring($im, 5, 5, 3, $randval, $stringColor);
$this->output($im,$type);
}
/**
* 输出图像
*
* @param string $im
* @param string $type
*/
function output($im,$type='png')
{
header("Content-type: image/".$type);
$ImageFun='Image'.$type;
$ImageFun($im);
imagedestroy($im);
}
/**
* 产生随机字串，字母和数字混合
*
* @param string $len 长度
* @param string $type 字串类型 (0 字母 1 数字 其它 混合)
* @param string $addChars 额外字符
* @return string
*/
function rand_string($len=4,$type='',$addChars='') {
$str ='';
switch($type) {
case 0:
$chars='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.$addChars;
break;
case 1:
$chars= str_repeat('0123456789',3);
break;
case 2:
$chars='ABCDEFGHIJKLMNOPQRSTUVWXYZ'.$addChars;
break;
case 3:
$chars='abcdefghijklmnopqrstuvwxyz'.$addChars;
break;
default :
// 默认去掉了容易混淆的字符oOLl和数字01，要添加请使用addChars参数
$chars='ABCDEFGHIJKMNPQRSTUVWXYZabcdefghijkmnpqrstuvwxyz23456789'.$addChars;
break;
}
if($len>10 ) {//位数过长重复字符串一定次数
$chars= $type==1? str_repeat($chars,$len) : str_repeat($chars,5);
}
if($type!=4) {
$chars = str_shuffle($chars);
$str = substr($chars,0,$len);
}else{
// 中文随机字
for($i=0;$i<$len;$i++){
$str.= substr($chars, floor(mt_rand(0,mb_strlen($chars,'utf-8')-1)),1);
}
}
return $str;
}
}