xarxaprod-wp-plugin/includes/enable-svg.php

<?php

/**
 * Add mimetypes support: svg
 *
 * This class defines all code necessary to run during the plugin's activation.
 *
 * @link       https://xarxaprod.cat
 * @since      1.0.0
 * @package    xarxaprod-wp-plugin 
 * @subpackage xarxaprod-wp-plugin/includes
 * @author     Jorge - vitrubio.net <jorge@vitrubio.net>
 */
 if (! function_exists ('enable_mime_types') ){
  function enable_mime_types( $mimes ) {
     $mimes['svg'] = 'image/svg+xml';
     return $mimes;
  }
  add_filter('upload_mimes', 'enable_mime_types');
 }