Disable theme switching for all (or all except admin) by hiding theme menu item under Appearance

disable theme switching

// disable theme switching by hiding theme item - for all except admin (id 1)
add_action( ‘admin_init’, ‘slt_lock_theme’ );
function slt_lock_theme() {
  global $submenu, $userdata;
  get_currentuserinfo();
  if ( $userdata->ID != 1 ) {
    unset( $submenu['themes.php'][5] );
    unset( $submenu['themes.php'][15] );
  }
}

// disable theme switching by hiding theme item - for all
add_action( ‘admin_init’, ‘wplg_lock_theme’ );
  function wplg_lock_theme() {
  global $submenu;
  unset( $submenu['themes.php'][5] );
  unset( $submenu['themes.php'][15] );
}