Zend_Captcha

注

• 以下captcha适配器皆可自定义,或者重写,具体请参照源代码.
• 以下captcha适配器的配置参数options,也可以通过setXxx()的方式设置,或者使用Zend_Config_Ini
• 以下captcha适配器的isValid(),如果可以保障第一个参数包含所需的值时,可以省略第二参数,直接传递$this->_requet->getPost()
• Zend_Captcha_Image的startImage参数并非是背景图片,如果需要可以extends Zend_Captcha_Image,重写_generateImage方法

Zend_Captcha_Recaptcha

ReCaptcha 适配器使用Zend_Service_ReCaptcha来生成校验captchas.支持图片与音频验证 DEMO, 同时支持EMAIL(在页面上显示EMAIL时,避免spam).了解更多.使用方法如下:

<?php
$captcha = new Zend_Captcha_Recaptcha(array(
    'theme'   => 'white',//主题
    'pubkey'=>'...',     //公钥(Public Key)
    'privkey'=>'...')    //私钥(Private Key)
);
//增加配置选项(默认仅支持lang,theme)
$captcha->getService()->setOption('custom_translations', array(
                    'instructions_visual'=>"请输入两个单词:",
                    'instructions_audio'=>"请输入验证码:",
                    'play_again'=> "再听一次",
                    'cant_hear_this'=>"听不到?下载MP3格式",
                    'visual_challenge'=> "字符",
                    'audio_challenge'=>"朗读",
                    'refresh_btn'=>"刷新",
                    'help_btn'=> "帮助",
                    'incorrect_try_again'=>"验证码错误,再试一次?"));

if($this->_request->isPost()){
    $request_data = array(
          'recaptcha_challenge_field'=>$this->_getParam('recaptcha_challenge_field'), 
          'recaptcha_response_field'=>$this->_getParam('recaptcha_response_field')
    );
    //验证
    if ($captcha->isValid($request_data, $this->_request->getPost())){
        echo 'Correct';
    }else {
        echo 'Incorrect';
        $captcha->setMessage('出错拉', 'badCaptcha');//设置消息模板,如果使用Translator,该设置无效
        Zend_Debug::dump($captcha->getMessages());
    }
}else {
    $this->view->captcha = $captcha->render();
}

//phtml:
?>
<form id="form1" name="form1" action="#" method="post">
	<?php echo $this->captcha?>
	<input type="submit">
</form>

Zend_Captcha_Dumb

Dumb 适配器只用于测试或者最后方案.继承Zend_Captcha_Word,提供了随机字符串需要用反序输入来校验(strrev).

<?php
$captcha = new Zend_Captcha_Dumb(array(
    //'name' => 'foo',   //用于替换input的name的值,captcha[input]或者captcha[id]中的captcha,Zend_Form表单生成使用
    'wordLen' => 6,      //生成长度
    'timeout' => 300,    //SSL
    '_useNumbers'=>false //仅字符
));
if($this->_request->isPost()){
    if($captcha->isValid($this->_getParam('captcha'), $this->_request->getPost())){
      //Correct
    }else{
      //Incorrect
    }
}else {
    $this->view->captcha_id = $captcha->generate();
    $this->view->captch = $captcha->render();
}

//phtml:
?>
<form id="form1" name="form1" action="#" method="post">
  <input type="input" name="captcha[input]" id="captcha-input">
  <input type="hidden" name="captcha[id]" id="captcha-id" value="<?php echo $this->captcha_id?>">
  <input type="submit">
</form>

Zend_Captcha_Figlet

Figlet 适配器利用Zend_Text_Figlet 来展示一个FIGlet text. Figlet Captchas只限于字符.你可以在这里下载Figlet字体.

<?php
$captcha = new Zend_Captcha_Figlet(array(
    'font'=>'fonts/digital.flf', //指定新字体(可使用相对路径)
    'wordLen' => 6,              //生成长度
    'timeout' => 300             //SSL
));
if($this->_request->isPost()){
    if($captcha->isValid($this->_getParam('captcha'), $this->_request->getPost())){
      //Correct
    }else{
      //Incorrect
    }
}else {
    $this->view->captcha_id = $captcha->generate();
    $this->view->captch = $captcha->render();
}

//phtml:
?>
<form id="form1" name="form1" action="#" method="post">
  <input type="input" name="captcha[input]" id="captcha-input">
  <input type="hidden" name="captcha[id]" id="captcha-id" value="<?php echo $this->captcha_id?>">
  <input type="submit">
</form>

Zend_Captcha_Image

Image 适配器使用生成的字符解析为图像. 需要GD库支持.目前仅支持PNG格式.

<?php
$captcha = new Zend_Captcha_Image(array(
    'wordLen' 		=> 5,                  //字符长度
    'fontsize' 		=> 18,                 //字体大小
    'width' 		=> 120,                //图像宽度
    'height' 	 	=> 40,                 //图像高度
    'dotNoiseLevel' => 2,                  //噪点数
    'lineNoiseLevel'=> 5,                  //干扰线条
    'timeout' 		=> 10,                 //SSL
    'font' 			=> 'fonts/Faktos.ttf', //字体文件
    'imgDir' 		=> './captcha/',       //生成的图像目录
    'imgUrl' 		=> '/captcha/',        //图像访问网址(相对路径)
    'gcFreq' 		=> 2,                  //执行垃圾收集频率(mt_rand(1, gcFreq) == 1)
    'expiration' 	=> 10,                 //生成图像过期(秒)
    'imgAlt'		=> '验证码',           //图片ALT
    'startImage'    => 'images/startimage.png'  //基于该图片生成(非背景图片)
));
if($this->_request->isPost()){
    if($captcha->isValid($this->_getParam('captcha'), $this->_request->getPost())){
      //Correct
    }else{
      //Incorrect
    }
}else {
    $this->view->captcha_id = $captcha->generate();
    $this->view->captch = $captcha->render();
}

//phtml:
?>
<form id="form1" name="form1" action="#" method="post">
  <input type="input" name="captcha[input]" id="captcha-input">
  <input type="hidden" name="captcha[id]" id="captcha-id" value="<?php echo $this->captcha_id?>">
  <input type="submit">
</form>