関数リファレンス/is page

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

$page

（mixed） （optional） Page ID, Page Title or Page Slug

初期値： なし

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() )

• See also: is_singular()

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.

• See also is_page_template()

Change Log

Since: 1.5.0

Source File

is_page() is located in wp-includes/query.php.

Related

条件分岐タグ： is_404(), is_admin(), is_admin_bar_showing(), is_archive(), is_attachment(), is_author(), is_category(), is_comments_popup(), is_date(), is_day(), is_feed(), is_front_page(), is_home(), is_local_attachment(), is_main_query, /is_multi_author, is_month(), is_new_day(), is_page(), is_page_template(), is_paged(), is_plugin_active(), is_plugin_active_for_network() /en, is_plugin_inactive() /en, is_plugin_page() /en, is_post_type_archive(), is_preview() /en, 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() /en, is_rtl(), is_dynamic_sidebar(), is_user_logged_in(), has_excerpt(), has_post_thumbnail(), has_tag(), pings_open(), email_exists(), post_type_exists(), taxonomy_exists(), term_exists(), username_exists() /en, wp_attachment_is_image(), wp_script_is()

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