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The user logs in, queries the ranking list, how to obtain the ranking value through js, and reminds people within 30 people who are eligible to register through alert.

<div class="row">
    <div class="col-lg-12">
        <div class="form-group mb-3">
            <div class="form-control text-center" >您的积分总和为：{$score['perfor_sum']} 当前排名第<span id="ranking">{$ranking['perfor']}</span>位</div>
        </div>
    </div> <!-- end col -->
</div>

微信图片_20190719111634.png

<script>
    var oDiv = document.getElementById('ranking');
    alert(oDiv.innerHTML);
</script>

微信图片_20190719111723.png

Mr.Lv1960 days ago1249

reply all(7)I'll reply

kanglecheng2019-07-19 14:32:35

Just add judgment. For error reporting, please refer to https://www.php.cn/blog/detail/14059.html

still empty

— Mr.Lv · 2019-07-19 14:47:05

1. Take a look at the examples in the link 2. Your data was not obtained

— kanglecheng · 2019-07-19 14:50:40

I’ve tried all of your 1, 2, and 3 writing methods, but the data is not obtained.

— Mr.Lv · 2019-07-19 15:11:34

Data output from the background {$ranking['perfor']}

— kanglecheng · 2019-07-19 16:33:34

Your tag must exist first. If you add judgment later and then render it, an innerHTML error will be reported.

— kanglecheng · 2019-07-19 16:37:49

kanglecheng2019-07-19 14:30:32

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