is_page() - WordPress 函数参考中文文档



发布于 2017-09-11 字数8624 浏览 844 评论 0

is_page( int|string|array $page = '' )

Is the query for an existing single page?


If the $page parameter is specified, this function will additionally check if the query is for one of the pages specified.



Page ID, title, slug, or array of such.

Default value: ”


(bool) Whether the query is for an existing single page.


File: wp-includes/query.php

function is_page( $page = '' ) {
	global $wp_query;

	if ( ! isset( $wp_query ) ) {
		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
		return false;

	return $wp_query->is_page( $page );


Version 描述
1.5.0 Introduced.

More Information


  • Will return true if an empty value is passed
  • Due to certain global variables being overwritten during The Loop, is_page() will not work. In order to call it after The Loop, you must call wp_reset_query() first.



  • wp-includes/l10n.php:
  • wp-includes/class-wp-query.php:
  • wp-includes/functions.php:

Used By

  • wp-includes/general-template.php:
  • wp-includes/post-template.php:
  • wp-includes/post-template.php:
  • wp-includes/canonical.php:
  • wp-includes/comment-template.php:

User Contributed Notes

  1. Skip to note content

    You must log in to vote on the helpfulness of this noteVote results for this note: 5You must log in to vote on the helpfulness of this note

    Contributed by Mayeenul Islam

    is_page() supports array too:

    if( is_page( array( 'about-us', 'contact', 'management' ) )
         //either in about us, or contact, or management page is in view
         //none of the page about us, contact or management is in view
    // When any single Page is being displayed.
    // When Page 42 (ID) is being displayed.
    is_page( 42 );
    // When the Page with a post_title of "Contact" is being displayed.
    is_page( 'Contact' );
    // When the Page with a post_name (slug) of "about-me" is being displayed.
    is_page( 'about-me' );
     * Returns true when the Pages displayed is either post ID 42,
     * or post_name "about-me", or post_title "Contact".
     * Note: the array ability was added in version 2.5.
    is_page( array( 42, 'about-me', 'Contact' ) );

    Testing for paginated Pages

    You can use this code to check whether you’re on the nth page in a Post or PAGE Page that has been divided into pages using the <!--nextpage--> QuickTag. This can be useful, for example, if you wish to display meta data only on the first page of a post divided into several pages.

    Example 1

    $paged = $wp_query->get( 'paged' );
    if ( ! $paged || $paged < 2 ) {
        // This is not a paginated page (or it's simply the first page of a paginated page/post)
    } else {
       // This is a paginated page.

    Example 2

    $paged = get_query_var( 'paged' ) ? get_query_var( 'paged' ) : false;
    if ( $paged === false ) {
        // This is not a paginated page (or it's simply the first page of a paginated page/post)
    } else {
       // This is a paginated page.

    Testing for sub-Pages

    There is no is_subpage() function yet, but you can test this with a little code:

    Snippet 1

    // If outside the loop.
    $post = get_post();
    if ( is_page() && $post->post_parent ) {
        // This is a subpage
    } else {
        // This is not a subpage

    You can create your own is_subpage() function using the code in Snippet 2. Add it to your functions.php file. It tests for a parent page in the same way as Snippet 1, but will return the ID of the page parent if there is one, or false if there isn’t.

    Snippet 2

     * Check whether we are on a subpage
     * @return mixed ID of the parent post or false if this is not a subpage.
    function wpdocs_is_subpage() {
    	// Load details about this page.
    	$post = get_post();
    	// test to see if the page has a parent
    	if ( is_page() && $post->post_parent ) {
    		// Return the ID of the parent post.
    		return $post->post_parent;
    	// There is no parent so ...
    	} else {
    		// ... The answer to the question is false
            	return false;

    It is advisable to use a function like that in Snippet 2, rather than using the simple test like Snippet 1, if you plan to test for sub pages frequently.

    To test if the parent of a page is a specific page, for instance “About” (page id pid 2 by default), we can use the tests in Snippet 3. These tests check to see if we are looking at the page in question, as well as if we are looking at any child pages. This is useful for setting variables specific to different sections of a web site, so a different banner image, or a different heading.

    Snippet 3

    if ( is_page( 'about' ) || '2' == $post->post_parent ) {    
    	// the page is "About", or the parent of the page is "About"
    	$bannerimg = 'about.jpg';
    } elseif ( is_page( 'learning' ) || '56' == $post->post_parent ) {	
    	$bannerimg = 'teaching.jpg';
    } elseif ( is_page( 'admissions' ) || '15' == $post->post_parent ) { 
    	$bannerimg = 'admissions.jpg';
    } else { 
    	$bannerimg = 'home.jpg'; // just in case we are at an unclassified page, perhaps the home page

    Snippet 4 is a function that allows you to carry out the tests above more easily. This function will return true if we are looking at the page in question (so “About”) or one of its sub pages (so a page with a parent with ID “2”).

    Snippet 4

     * Check whether we are on this page or a sub page
     * @param int $pid Page ID to check against.
     * @return bool True if we are on this page or a sub page of this page.
    function wpdocs_is_tree( $pid ) {      // $pid = The ID of the page we're looking for pages underneath
    	$post = get_post();               // load details about this page
    	$is_tree = false;
    	if ( is_page( $pid ) ) {
    		$is_tree = true;            // we're at the page or at a sub page
    	$anc = get_post_ancestors( $post->ID );
    	foreach ( $anc as $ancestor ) {
    		if ( is_page() && $ancestor == $pid ) {
    			$is_tree = true;
    	return $is_tree;  // we arn't at the page, and the page is not an ancestor

    Add Snippet 4 to your functions.php file, and call is_tree( 'id' ) to see if the current page is the page, or is a sub page of the page. In Snippet 3, is_tree( '2' ) would replace “is_page( 'about' ) || '2' == $post->post_parent” inside the first if tag.

    Note that if you have more than one level of pages the parent page is the one directly above and not the one at the very top of the hierarchy.

    Testing for Custom Post Type Sub-Pages

    $page = get_post();
    if ( is_singular('Custom_Post_Type_Name_Here') && $page->post_parent > 0 ) {
        // This is a custom post type subpage
    } else {
        // This is not a custom post type subpage




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