Question

has_nav_menu( string $location )

Determines whether a registered nav menu location has a menu assigned to it.

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description

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参数

$location

(string) (Required) Menu location identifier.

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返回值

(bool) Whether location has a menu.

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源代码

File: wp-includes/nav-menu.php

function has_nav_menu( $location ) {
	$has_nav_menu = false;

	$registered_nav_menus = get_registered_nav_menus();
	if ( isset( $registered_nav_menus[ $location ] ) ) {
		$locations = get_nav_menu_locations();
		$has_nav_menu = ! empty( $locations[ $location ] );
	}

	/**
	 * Filters whether a nav menu is assigned to the specified location.
	 *
	 * @since 4.3.0
	 *
	 * @param bool   $has_nav_menu Whether there is a menu assigned to a location.
	 * @param string $location     Menu location.
	 */
	return apply_filters( 'has_nav_menu', $has_nav_menu, $location );
}

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更新日志

Version	description
3.0.0	Introduced.

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相关函数

Uses

• wp-includes/nav-menu.php: has_nav_menu
• wp-includes/plugin.php: apply_filters()
• wp-includes/nav-menu.php: get_registered_nav_menus()
• wp-includes/nav-menu.php: get_nav_menu_locations()

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User Contributed Notes

1. Skip to note content You must log in to vote on the helpfulness of this noteVote results for this note: 1You must log in to vote on the helpfulness of this note Contributed by Codex

   Example

   
   if ( has_nav_menu( 'primary' ) ) {
   	wp_nav_menu( array( 'theme_location' => 'primary' ) );
   }