Typecho评论增加验证码

#生成验证码
function comment_protection_code(){
    $num1=rand(1,9);
    $num2=rand(1,9);
    $rand=rand(1,100)%3;
    switch($rand){
        case 0:
            $ret=$num1 + $num2;
            $symbol='＋';
        break;
        case 1:
            $ret=$num1 - $num2;
            $symbol='－';
        break;
        case 2:
            $ret=$num1 * $num2;
            $symbol='×';
        break;
    }
    @session_start();
    $_SESSION['verify']=$ret;
    $_SESSION['verify_md5']=md5($num1.$num2);
    @session_write_close();
    echo "";
    echo "\n";
    echo "";
}

#判断路由用到
function endsWith($haystack, $needle){
    return $needle === '' || substr_compare($haystack, $needle, -strlen($needle)) === 0;
}

...

    

#上方为原始代码
#下方为新增

fields->code ==='yes'): ?>

$code = new Typecho_Widget_Helper_Form_Element_Radio (
        'code',
        array(
            'no' => '否',
            'yes' => '是'
        ),
        'no',
        '评论是否启用验证码',
        '介绍：用于设置当前文章评论时是否需要输入验证码 
 '
    );
    $layout->addItem($code);

/* 激活评论提交 已修改 */
/* 激活评论提交 已修改 */
       {
        if ($('.joe_comment').length) {
            let isSubmit = false;
            $('.joe_comment__respond-form').on('submit', function (e) {
                e.preventDefault();
                const action = $('.joe_comment__respond-form').attr('action') + '?time=' + +new Date();
                const type = $('.joe_comment__respond-form').attr('data-type');
                const parent = $('.joe_comment__respond-form').attr('data-coid');
                const author = $(".joe_comment__respond-form .head input[name='author']").val();
                const _ = $(".joe_comment__respond-form input[name='_']").val();
                const mail = $(".joe_comment__respond-form .head input[name='mail']").val();
                const url = $(".joe_comment__respond-form .head input[name='url']").val();
                const sum = $(".joe_comment__respond-form .head input[name='sum']").val();
                const num1 = $(".joe_comment__respond-form .head input[name='num1']").val();
                const rand = $(".joe_comment__respond-form .head input[name='rand']").val();
                const num2 = $(".joe_comment__respond-form .head input[name='num2']").val();
                let text = $(".joe_comment__respond-form .body textarea[name='text']").val();
                if (sum === '') return Qmsg.info('请输入验证信息！');
                if (rand === '＋') {
                    if (sum != Number(num1) + Number(num2)) return Qmsg.warning('验证码错误,请重试！');
                } else if (rand === '－') {
                    if (sum != Number(num1) - Number(num2)) return Qmsg.warning('验证码错误,请重试！');
                } else if (rand === '×') {
                    if (sum != Number(num1) * Number(num2)) return Qmsg.warning('验证码错误,请重试！');
                } 
                if (author.trim() === '') return Qmsg.info('请输入昵称！');
                if (!/\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*/.test(mail)) return Qmsg.info('请输入正确的邮箱！');
                if (type === 'text' && text.trim() === '') return Qmsg.info('请输入评论内容！');
                if (type === 'draw') {
                    const txt = $('#joe_comment_draw')[0].toDataURL('image/webp', 0.1);
                    text = '{!{' + txt + '}!} ';
                }
                if (isSubmit) return;
                isSubmit = true;
                $('.joe_comment__respond-form .foot .submit button').html('发送中...');
                $.ajax({
                  url: action,
                  type: "POST",
                  data: { author, mail, text, parent, url, _ },
                  dataType: "text",
                  success(res) {
                    let arr = [],
                      str = "";
                    arr = $(res).contents();
                    Array.from(arr).forEach((_) => {
                      if (_.parentNode.className === "container") str = _;
                    });
                    if (!/Joe/.test(res)) {
                      Qmsg.warning(str.textContent.trim() || "");
                      isSubmit = false;
                      $(".joe_comment__respond-form .foot .submit button").html("发表评论");
                    } else {
                      window.location.reload();
                    }
                  },
                  error() {
                    isSubmit = false;
                    $(".joe_comment__respond-form .foot .submit button").html("发表评论");
                    Qmsg.warning("发送失败！请刷新重试！");
                  },
                });
            });
        }
    }

/*验证码处css*/
@media (min-width: 768px) {
  .joe_comment__respond-form .head .list:nth-child(4) {
      position: relative
  }

  .joe_comment__respond-form .head .list:nth-child(4)::before {
      content: '';
      position: absolute;
      top: 50%;
      transform: translateY(-50%);
      width: 1px;
      height: 15px;
      background: var(--classA)
  }

  .joe_comment__respond-form .head .list:nth-child(4)::before {
      left: 0
  }
}