尝试将其添加到函数中。php：

add_filter("wp_image_editors", "my_wp_image_editors");

function my_wp_image_editors($editors) {
    array_unshift($editors, "WP_Image_Editor_Custom");
    return $editors;
}

// Include the existing classes first in order to extend them.
require_once ABSPATH . WPINC . "/class-wp-image-editor.php";
require_once ABSPATH . WPINC . "/class-wp-image-editor-gd.php";

class WP_Image_Editor_Custom extends WP_Image_Editor_GD {

    public function generate_filename($suffix = null, $dest_path = null, $extension = null) {
        // $suffix will be appended to the destination filename, just before the extension
        if (!$suffix) {
            $suffix = $this->get_suffix();
        }

        $dir = pathinfo($this->file, PATHINFO_DIRNAME);
        $ext = pathinfo($this->file, PATHINFO_EXTENSION);

        $name = wp_basename($this->file, ".$ext");
        $new_ext = strtolower($extension ? $extension : $ext );

        if (!is_null($dest_path) && $_dest_path = realpath($dest_path)) {
            $dir = $_dest_path;
        }
        //we get the dimensions using explode, we could have used the properties of $this->file[height] but the suffix could have been provided
        $size_from_suffix = explode("x", $suffix);
        //we get the slug_name for this dimension
        $slug_name = $this->get_slug_by_size($size_from_suffix[0], $size_from_suffix[1]);

        return trailingslashit($dir) . "{$slug_name}/{$name}.{$new_ext}";
    }

    function multi_resize($sizes) {
        $sizes = parent::multi_resize($sizes);

        //we add the slug to the file path
        foreach ($sizes as $slug => $data) {
            $sizes[$slug][\'file\'] = $slug . "/" . $data[\'file\'];
        }

        return $sizes;
    }

    function get_slug_by_size($width, $height) {

        // Make thumbnails and other intermediate sizes.
        $_wp_additional_image_sizes = wp_get_additional_image_sizes();

        $image_sizes = array(); //all sizes the default ones and the custom ones in one array
        foreach (get_intermediate_image_sizes() as $s) {
            $image_sizes[$s] = array(\'width\' => \'\', \'height\' => \'\', \'crop\' => false);
            if (isset($_wp_additional_image_sizes[$s][\'width\'])) {
                // For theme-added sizes
                $image_sizes[$s][\'width\'] = intval($_wp_additional_image_sizes[$s][\'width\']);
            } else {
                // For default sizes set in options
                $image_sizes[$s][\'width\'] = get_option("{$s}_size_w");
            }

            if (isset($_wp_additional_image_sizes[$s][\'height\'])) {
                // For theme-added sizes
                $image_sizes[$s][\'height\'] = intval($_wp_additional_image_sizes[$s][\'height\']);
            } else {
                // For default sizes set in options
                $image_sizes[$s][\'height\'] = get_option("{$s}_size_h");
            }

            if (isset($_wp_additional_image_sizes[$s][\'crop\'])) {
                // For theme-added sizes
                $image_sizes[$s][\'crop\'] = $_wp_additional_image_sizes[$s][\'crop\'];
            } else {
                // For default sizes set in options
                $image_sizes[$s][\'crop\'] = get_option("{$s}_crop");
            }
        }
        $slug_name = ""; //the slug name

        if($width >= $height){
          foreach ($image_sizes as $slug => $data) { //we start checking
            if ($data[\'width\'] == $width) {//we use only width because regardless of the height, the width is the one used for resizing in all cases with crop 1 or 0
                $slug_name = $slug;
            }
            /*
             * There could be custom added image sizes that have the same width as one of the defaults so we also use height here
             * if there are several image sizes with the same width all of them will override the previous one leaving the last one, here we get also the last one
             * since is looping the entire list, the height is used as a max value for non-hard cropped sizes
             *  */
              if ($data[\'width\'] == $width && $data[\'height\'] == $height) {
                  $slug_name = $slug;
              }
          }
         }else{
           foreach ($image_sizes as $slug => $data) {
              if ($data[\'height\'] == $height) {
                  $slug_name = $slug;
              }
              if ($data[\'height\'] == $height && $data[\'width\'] == $width ) {
                  $slug_name = $slug;
              }
            }
         }
        return $slug_name;
    }
}

    Array
    (
        [thumbnail] => Array // Thumbnail (150 x 150 hard cropped)
            (
                [width] => 150
                [height] => 150
                [crop] => 1
            )

        [medium] => Array // Medium resolution (300 x 300 max height 300px)
            (
                [width] => 300
                [height] => 300
                [crop] => 
            )

        [medium_large] => Array //Medium Large (added in WP 4.4) resolution (768 x 0 infinite height)
            (
                [width] => 768
                [height] => 0
                [crop] => 
            )

        [large] => Array // Large resolution (1024 x 1024 max height 1024px)
            (
                [width] => 1024
                [height] => 1024
                [crop] => 
            )

    )
// Full resolution (original size uploaded) this one is not in the array.