将此添加到您的函数中。php，或最好是functionality plugin.

add_action( \'admin_footer-post-new.php\', \'media_manager_default\' );
add_action( \'admin_footer-post.php\', \'media_manager_default\' );

function media_manager_default() {
    ?>
    <script type="text/javascript">
        jQuery(document).ready(function($){
            wp.media.controller.Library.prototype.defaults.contentUserSetting=false;
        });
    </script>
    <?php
}

如果有人仍在寻找解决方案，此解决方案适用于我在任何帖子类型和特色图片中上传的所有图像：

function upload_media_manager_by_default() {
  if ( did_action( \'wp_enqueue_media\' ) ) {
    ?>
    <script type="text/javascript">
      jQuery( document ).ready( function ( $ ) {
        wp.media.controller.Library.prototype.defaults.contentUserSetting = false;
        wp.media.controller.FeaturedImage.prototype.defaults.contentUserSetting = false;
      });
    </script>
  <?php
  }
}

add_action( \'admin_footer\', \'upload_media_manager_by_default\' );