这只是一种PHP快捷方式，但您可以创建一个映射，描述哪些条件值映射到哪些菜单位置，并在其中循环测试每个条件并打印匹配的菜单：

/**
 * Prints wp_nav_menu(s) by matching conditional function arguments to menu locations.
 *
 * @param array   $locations A mapping of predicate function names to associative
 *                           arrays mapping predicate function arguments to menu
 *                           locations.
 * @param array   $args Optional. An associative array of arguments to pass on to
 *                      wp_nav_menu().
 * @param boolean $multiple Optional. Whether or not to allow multiple menus to
 *                          match/print.
 * @return string|void The menu(s) markup, if $args[\'echo\'] is set to false.
 **/
wpse390599_conditional_nav_menu( $locations, $args = [], $multiple = false ) {
  $conditional_locations = $locations;
  $markup                = \'\';
  $return                = isset( $args[\'echo\'] ) && $args[\'echo\'] === false;

  foreach( $conditional_locations as $predicate => $locations ) {
    foreach( $locations as $condition => $location ) {
      if( ! call_user_func( $predicate, $condition ) )
        continue; // No match - skip location.

      // Predicate conditional returned TRUE - print the menu
      $args[\'location\'] = $location;
      $markup = wp_nav_menu( $args );

      // If we\'re not facilitating multiple matching menus, bail out.
      if( ! $multiple ) {
        // Return the markup if `$args[\'echo\'] is false, per wp_nav_menu() convention.
        if( $return )
          return $markup;
    
        return;
      }
    }
  }

  // If multiple menus were matched and $args[\'echo\'] is false, return the markup.
  if( $return )
     return $markup;
}

wpse390599_conditional_nav_menu(
  [
    \'is_page\' => [
      \'page-1\' => \'secondary-menu-1\',
      \'page-2\' => \'secondary-menu-2\',
      \'\'       => \'secondary-menu-default\',
     ],
  ]
);

这是否比您当前的解决方案更易于维护，实际上取决于用例的具体情况。注意，此结构不支持采用多个参数的WordPress条件谓词，例如。is_tax( $taxonomy, $term ).