小编Rav*_*lov的帖子

我正在编写用于引导程序崩溃的PHP代码，并报错无法读取null的属性'querySelectorAll'。我花了很多时间解决这个简单的问题。如果我没有php就可以正常工作而没有错误错误是：

Uncaught TypeError: Cannot read property 'querySelectorAll' of null
at a.t._getParent (collapse.js:300)
at new a (collapse.js:88)
at HTMLDivElement.<anonymous> (collapse.js:345)
at Function.each (jquery.js:368)
at jQuery.fn.init.each (jquery.js:157)
at jQuery.fn.init.a._jQueryInterface [as collapse] (collapse.js:331)
at HTMLDivElement.<anonymous> (collapse.js:378)
at Function.each (jquery.js:368)
at jQuery.fn.init.each (jquery.js:157)
at HTMLButtonElement.<anonymous> (collapse.js:374)

那是我的PHP代码

<div id="info-content" class="accordion" id="accordionExample">
                  <?
                    $faqs = get_field('faqs');
                    foreach ($faqs as $key => $value):
                  ?>
                  <div class="card">
                    <div class="card-header" id="headingOne<?=$key;?>">
                      <h5 class="mb-0">
                        <button class="btn btn-link" type="button" data-toggle="collapse" data-target="#collapseOne<?=$key;?>" aria-expanded="true" aria-controls="collapseOne<?=$key;?>">
                          <?=$value['question'];?>
                        </button>
                      </h5>
                      <i class="fas fa-plus"></i>
                    </div> …