WP建独立站如何自动的给图片添加Alt标签

在使用wordpress做独立站的过程中，如何给上传的每张图片自动地添加alt文本，可以看下面地代码，将下面的代码添加到网站的functions.php文件中或者使用code snippet等插件。最好使用code snippet插件，这样以后主题升级，不会导致网站的代码被覆盖。

function enqueue_custom_inline_admin_script() {
      ?>
      <script type="text/javascript">
      jQuery(document).ready(function($) {
          function updateAltText() {
             
              var imageTitle1 = $("#attachment-details-title").val();
              var imageTitle2 = $("#attachment-details-two-column-title").val();
            
              if (typeof imageTitle1 === 'string') { imageTitle1 = imageTitle1.replace(/-/g, ' '); $("#attachment-details-title").val(imageTitle1); } else { imageTitle1 = ""; } if (typeof imageTitle2 === 'string') { imageTitle2 = imageTitle2.replace(/-/g, ' '); $("#attachment-details-two-column-title").val(imageTitle2); } else { imageTitle2 = ""; }
            
              var altTextField1 = $("#attachment-details-alt-text");
              var altTextField2 = $("#attachment-details-two-column-alt-text");
             
              if (altTextField1.length && (altTextField1.val().trim() === "" || altTextField1.val().trim() === imageTitle1)) {
                  altTextField1.val(imageTitle1);
              }
              if (altTextField2.length && (altTextField2.val().trim() === "" || altTextField2.val().trim() === imageTitle2)) {
                  altTextField2.val(imageTitle2);
              }
          }
     
          $(document).on("click", ".media-modal-close, .media-button-select, .attachment, .attachment-preview", function() {
              setTimeout(updateAltText, 500);
          });
          $(document).on("DOMNodeInserted", function(e) {
              if ($(e.target).find("#attachment-details-alt-text, #attachment-details-two-column-alt-text").length) {
                  setTimeout(updateAltText, 500);
              }
          });
      });
      </script>
      <?php
    }
    add_action('admin_head', 'enqueue_custom_inline_admin_script');