thinkphp3.2 验证码生成和点击刷新验证码

生成验证码的时候：

public function verify_c(){
    $Verify = new \Think\Verify();
    $Verify->fontSize = 18;
    $Verify->length   = 4;
    $Verify->useNoise = false;
    $Verify->codeSet = '0123456789';
    $Verify->imageW = 130;
    $Verify->imageH = 50;
    //$Verify->expire = 600;
    $Verify->entry();
}

　　

<p class="top15 captcha" id="captcha-container">
  <input name="verify" width="50%" height="50" class="captcha-text" placeholder="验证码" type="text">
  <img width="30%" class="left15" height="50" alt="验证码" src="{:U('Home/Index/verify_c',array())}" title="点击刷新">
</p>

　　

    $(function () {
        var captcha_img = $('#captcha-container').find('img')
        var verifyimg = captcha_img.attr("src");
        captcha_img.attr('title', '点击刷新');
        captcha_img.click(function(){
            if( verifyimg.indexOf('?')>0){
                $(this).attr("src", verifyimg+'&random='+Math.random());
            }else{
                $(this).attr("src", verifyimg.replace(/\?.*$/,'')+'?'+Math.random());
            }
        });
    })

　　验证在common.php中添加方法

function check_verify($code, $id = ""){
    $verify = new \Think\Verify();
    return $verify->check($code, $id);
}

　　提交表单的时候：

$verify = I('param.verify','');
if(!check_verify($verify)){
    $this->error("亲，验证码输错了哦！",$this->site_url,9);
}