WordPress Theme Security

functions.php

function remove_header_info() {
  remove_action( 'wp_head', 'feed_links_extra', 3 );
  remove_action( 'wp_head', 'rsd_link' );
  remove_action( 'wp_head', 'wlwmanifest_link' );
  remove_action( 'wp_head', 'wp_generator' );
  remove_action( 'wp_head', 'start_post_rel_link' );
  remove_action( 'wp_head', 'index_rel_link' );
  remove_action( 'wp_head', 'parent_post_rel_link', 10, 0 );
  remove_action( 'wp_head', 'adjacent_posts_rel_link_wp_head', 10, 0 );
}
add_action('init', 'remove_header_info');

function remove_wp_ver_css_js( $src ) {
  if ( strpos( $src, 'ver=' ) ) {
    $src = remove_query_arg( 'ver', $src );
  }
  return $src;
}
add_filter( 'style_loader_src', 'remove_wp_ver_css_js', 9999 );
add_filter( 'script_loader_src', 'remove_wp_ver_css_js', 9999 );