Function Reference/is page

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Description

This Conditional Tag checks if Pages are being displayed. This is a boolean function, meaning it returns either TRUE or FALSE. This tag must be used BEFORE The Loop and does not work inside The Loop (see Notes below).

Usage

%%%<?php is_page($page); ?>%%%

Parameters

tt$page/tt
(mixed) (optional) Page ID, Page Title or Page Slug
Default: Nonenoinclude

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Notes

This template is for standardizing how parameters look in the Function Reference and in Template Tags. Here is an example of this template being called: prenowiki检查到模板循环:模板:Parameter/nowiki/pre 检查到模板循环:模板:Parameter

The usage of this template is below: prenowiki检查到模板循环:模板:Parameter/nowiki/pre Let's take a closer look at the parameters..

name
The name of the parameter.
datatype
The datatype that should be given for this parameter when called.
  • string
  • integer
  • boolean
  • mixed
description
A short description of the parameter.
importance
Set this parameter to optional if the parameter is optional. Otherwise, do not declare this parameter—it defaults to required.
  • required
  • optional
default
If this parameter is optional, ttdefault/tt is the value that will be used if the parameter is not declared.

wordpress.org.cn /div /noinclude

Return Values

(boolean) 
true on success, false on failure.

Examples

is_page();
// When any single Page is being displayed.

is_page(42);
// When Page 42 (ID) is being displayed.

is_page('Contact');
// When the Page with a post_title of "Contact" is being displayed.

is_page('about-me');
// When the Page with a post_name (slug) of "about-me" is being displayed.

is_page(array(42,'about-me','Contact'));
// 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 at Version 2.5.

Notes

Passing Empty Value Returns TRUE

Be very careful if there's a possibility of passing an empty value as a parameter to check for a specific page, since the following lines will return true:

is_page( '' )
is_page( 0 )
is_page( '0' )
is_page( null )
is_page( false )
is_page( array() )

Cannot Be Used Inside The Loop

Due to certain global variables being overwritten during The Loop is_page() will not work. In order to use it after The Loop you must call wp_reset_query() after The Loop.

Change Log

Since: 1.5.0

Source File

is_page() is located in onlyincludecodewp-includes/query.php/code/onlyinclude

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Template Description

Link to the source code on http://core.trac.wordpress.org/browser/.

Parameters

  1. filename
  2. (option) path to codetag/code (version) or codetrunk/code. This option is only used for a new function.br /Default: codetrunk/code -- trunk is the latest bleeding edge development version of WordPress.

Usage

Link to the stable version: pre检查到模板循环:模板:Trac/pre

Link to trunk: pre检查到模板循环:模板:Trac/pre

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wordpress.org.cn.

Related

Conditional Tags: comments_open(), is_local_attachment(), is plugin active(), is_404(), is_admin(), is_archive(), is_attachment(), is_author(), is_category(), is_comments_popup(), is_date(), is_day(), is_feed(), is_front_page(), is_home(), is_month(), is_new_day(), is_page(), is_page_template(), is_paged(), is_plugin_page(), is_preview(), is_search(), is_single(), is_singular(), is_sticky(), is_tag(), is_tax(), is_taxonomy_hierarchical(), is_time(), is_trackback(), is_year(), in_category(), in_the_loop(), is_active_sidebar(), is_active_widget(), is_blog_installed(), is_dynamic_sidebar(), is_user_logged_in(), has_excerpt(), has_post_image(), has_tag(), pings_open(), post_type_exists(), taxonomy_exists(), term_exists(), username exists()

includeonlydiv style=clear:both; background-color:#F7F7F7; border:1px solid #CCCCCC; color:#000000; padding:7px; margin:0.5em auto 0.5em auto; vertical-align:middle;See also index of Function Reference and index of Template Tags./div/includeonlynoinclude

Description

This Template is used by Codex:Template Messages.

Usage

pre 检查到模板循环:模板:Message /pre

Result

检查到模板循环:模板:Message

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