// Allow SVG add_filter('wp_check_filetype_and_ext',function($data,$file,$filename,$mimes){global $wp_version;if ($wp_version !=='4.7.1'){return $data}$filetype=wp_check_filetype($filename,$mimes);return ['ext'=>$filetype['ext'],'type'=>$filetype['type'],'proper_filename'=>$data['proper_filename']]},10,4);function cc_mime_types($mimes){$mimes['svg']='image/svg+xml';return $mimes}add_filter('upload_mimes','cc_mime_types');function fix_svg(){echo '<style type="text/css">
        .attachment-266x266, .thumbnail img {
             width: 100% !important;
             height: auto !important;
        }
        </style>'}add_action('admin_head','fix_svg');