thinkphp5.0 实现图片验证效果且能点击图片刷新图片

思路与文件上传相同,只是验证码一个方法:

<img  src="{:captcha_src()}"  />

后台文件:app\ceshi\yam

<?phpnamespace app\ceshi\controller;use think\Controller;use think\Db;class Yzm extends Controller{    public  function index()    {        return $this->fetch();    }    public function check($code='')    {        $captcha = new \think\captcha\Captcha();        if(!$captcha->check($code)) {            $this->error('验证码错误');        }        else {            $this->success('验证码正确');        }    }}

前端文件:yzm/index.html

<!doctype html><html><head>    <meta charset="UTF-8">    <title>图片验证示例</title></head><body><h2>图片验证示例</h2><div>    <!--验证数据-->    <FORM method="post" class="form" action="{:url('check')}" name='tj'>        <p><input name="code" type="text" placeholder="请输入验证码" style="width:100px;">        <span>                <!--{:captcha_img()}-->                <img id="verify_img" src="{:captcha_src()}"  alt="请点击刷新验证码" onclick="this.src='{:captcha_src()}'+'?'+Math.random()"/>        </span>        </p>        <p style="margin-top:30px;"><input name="tj" type="submit" class="button" value="提交"></p>    </FORM></div></body></html>