Custom Fonts otf/ttf mime rewrite

index.php

class Foo {

  public function __construct() {
    // ...
    add_filter( 'wp_check_filetype_and_ext', array( $this, 'update_mime_types' ), 10, 3 );
    add_filter( 'upload_mimes', array( $this, 'add_fonts_to_allowed_mimes' ) );
  }

  // ...

  /**
   * Allowed mime types and file extensions
   *
   * @since 1.0.0
   * @param array $mimes Current array of mime types.
   * @return array $mimes Updated array of mime types.
   */
  public function add_fonts_to_allowed_mimes( $mimes ) {
    $mimes['woff']  = 'application/x-font-woff';
    $mimes['woff2'] = 'application/x-font-woff2';
    $mimes['ttf']   = 'application/x-font-ttf';
    $mimes['svg']   = 'image/svg+xml';
    $mimes['eot']   = 'application/vnd.ms-fontobject';
    $mimes['otf']   = 'font/otf';

    return $mimes;
  }

  /**
   * Correct the mome types and extension for the font types.
   *
   * @param array  $defaults File data array containing 'ext', 'type', and
   *                                          'proper_filename' keys.
   * @param string $file                      Full path to the file.
   * @param string $filename                  The name of the file (may differ from $file due to
   *                                          $file being in a tmp directory).
   * @return Array File data array containing 'ext', 'type', and
   */
  public function update_mime_types( $defaults, $file, $filename ) {
    if ( 'ttf' === pathinfo( $filename, PATHINFO_EXTENSION ) ) {
      $defaults['type'] = 'application/x-font-ttf';
      $defaults['ext']  = 'ttf';
    }

    if ( 'otf' === pathinfo( $filename, PATHINFO_EXTENSION ) ) {
      $defaults['type'] = 'application/x-font-otf';
      $defaults['ext']  = 'otf';
    }

    return $defaults;
  }
}