upload svg to wordpress

1// Wp v4.7.1 and higher
2add_filter( 'wp_check_filetype_and_ext', function($data, $file, $filename, $mimes) {
3  $filetype = wp_check_filetype( $filename, $mimes );
4  return [
5      'ext'             => $filetype['ext'],
6      'type'            => $filetype['type'],
7      'proper_filename' => $data['proper_filename']
8  ];
9
10}, 10, 4 );
11
12function cc_mime_types( $mimes ){
13  $mimes['svg'] = 'image/svg+xml';
14  return $mimes;
15}
16add_filter( 'upload_mimes', 'cc_mime_types' );
17
18function fix_svg() {
19  echo '<style type="text/css">
20        .attachment-266x266, .thumbnail img {
21             width: 100% !important;
22             height: auto !important;
23        }
24        </style>';
25}
26add_action( 'admin_head', 'fix_svg' );

1function cc_mime_types($mimes) {
2 $mimes['svg'] = 'image/svg+xml';
3 return $mimes;
4}
5add_filter('upload_mimes', 'cc_mime_types');