TP5 验证码功能实现

composer require topthink/think-captcha

..\vendor\topthink\think-captcha

<p class="pass-form-item">
        <label class="pass-label">验证码</label>
        <input type="text" name="verifyCode" class="pass-text-input " placeholder="请输入验证码">
      <div>{:captcha_img()}</div>
      </p>

function captcha_img($id = "")
{
    $js_src = "this.src='".captcha_src()."'";
    return '<img src="' . captcha_src($id) . '" alt="点击更新验证码"
     onclick="'.$js_src.'" />';
    //return '![](' . captcha_src($id) . ')';
}

 if(request()->isPost()){
            $data = input('post.');
            if(!captcha_check($data['verifyCode'])) {
                // 校验失败
                $this->error('验证码不正确');
            }
}