我的问题是如何将我从SVG中成功提取的尺寸标注附加到与文件关联的WP“dimensions”字段中，以便这些标注显示在媒体库中。

注：这是not 与…一样this earlier question I posted. 在这个问题中，我问了如何提取维度值。但是，没有人知道如何将该值永久设置为SVG，以便它显示在媒体库中

其中，我提取维度，我使用过滤器从SVG中提取图像维度。此过滤器允许我将SVG显示为特征图像，而不仅仅是徽标。我使用的过滤器从SVG文件内部识别SVG的大小，然后重置image[1] 和$image[2] 返回的数组中的值wp_get_attachment_image_src() 这就是功能：

File: wp-includes/media.php
804: /**
805:  * Retrieve an image to represent an attachment.
806:  *
807:  * A mime icon for files, thumbnail or intermediate size for images.
808:  *
809:  * The returned array contains four values: the URL of the attachment image src,
810:  * the width of the image file, the height of the image file, and a boolean
811:  * representing whether the returned array describes an intermediate (generated)
812:  * image size or the original, full-sized upload.
813:  *
814:  * @since 2.5.0
815:  *
816:  * @param int          $attachment_id Image attachment ID.
817:  * @param string|array $size          Optional. Image size. Accepts any valid image size, or an array of width
818:  *                                    and height values in pixels (in that order). Default \'thumbnail\'.
819:  * @param bool         $icon          Optional. Whether the image should be treated as an icon. Default false.
820:  * @return false|array Returns an array (url, width, height, is_intermediate), or false, if no image is available.
821:  */
822: function wp_get_attachment_image_src( $attachment_id, $size = \'thumbnail\', $icon = false ) {
823:    // get a thumbnail or intermediate image if there is one
824:    $image = image_downsize( $attachment_id, $size );
825:    if ( ! $image ) {
826:        $src = false;
827: 
828:        if ( $icon && $src = wp_mime_type_icon( $attachment_id ) ) {
829:            /** This filter is documented in wp-includes/post.php */
830:            $icon_dir = apply_filters( \'icon_dir\', ABSPATH . WPINC . \'/images/media\' );
831: 
832:            $src_file = $icon_dir . \'/\' . wp_basename( $src );
833:            @list( $width, $height ) = getimagesize( $src_file );
834:        }
835: 
836:        if ( $src && $width && $height ) {
837:            $image = array( $src, $width, $height );
838:        }
839:    }

这是我应用于该函数的过滤器，它更改$image[1] 和$image[2] （即图像宽度和高度）。

 add_filter( \'wp_get_attachment_image_src\', \'fix_wp_get_attachment_image_svg\', 10, 4 );  /* the hook */

 function fix_wp_get_attachment_image_svg($image, $attachment_id, $size, $icon) {
    if (is_array($image) && preg_match(\'/\\.svg$/i\', $image[0]) && $image[1] <= 1) {
        if(is_array($size)) {
            $image[1] = $size[0];
            $image[2] = $size[1];
        } elseif(($xml = simplexml_load_file($image[0])) !== false) {
            $attr = $xml->attributes();
            $viewbox = explode(\' \', $attr->viewBox);
            $image[1] = isset($attr->width) && preg_match(\'/\\d+/\', $attr->width, $value) ? (int) $value[0] : (count($viewbox) == 4 ? (int) $viewbox[2] : null);
            $image[2] = isset($attr->height) && preg_match(\'/\\d+/\', $attr->height, $value) ? (int) $value[0] : (count($viewbox) == 4 ? (int) $viewbox[3] : null);
        } else {
            $image[1] = $image[2] = null;
        }
    }
    return $image;
} 

过滤器工作，但媒体库不显示提取的数据过滤器工作$image[1] 和$image[2] 正在分配给放置的SVG元素的html宽度和高度。但是，正如下图所示，过滤器似乎没有更新图像的dimensions WP数据库中的字段。

我的问题总结：

我如何获取过滤器检索到的这些维度值，并将它们以允许我查看媒体库中维度的方式附加到数据库本身的图像文件？

谢谢

function svg_meta_data($data, $id){

    $attachment = get_post($id); // Filter makes sure that the post is an attachment
    $mime_type = $attachment->post_mime_type; // The attachment mime_type

    //If the attachment is an svg

    if($mime_type == \'image/svg+xml\'){

        //If the svg metadata are empty or the width is empty or the height is empty
        //then get the attributes from xml.

        if(empty($data) || empty($data[\'width\']) || empty($data[\'height\'])){

            $xml = simplexml_load_file(wp_get_attachment_url($id));
            $attr = $xml->attributes();
            $viewbox = explode(\' \', $attr->viewBox);
            $data[\'width\'] = isset($attr->width) && preg_match(\'/\\d+/\', $attr->width, $value) ? (int) $value[0] : (count($viewbox) == 4 ? (int) $viewbox[2] : null);
            $data[\'height\'] = isset($attr->height) && preg_match(\'/\\d+/\', $attr->height, $value) ? (int) $value[0] : (count($viewbox) == 4 ? (int) $viewbox[3] : null);
        }

    }

    return $data;

}

add_filter(\'wp_update_attachment_metadata\', \'svg_meta_data\', 10, 2);