Function Reference/post type exists

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Description

This Conditional Tag checks if a post type exists by passing a post type name an argument. This is a boolean function and uses a global $wp_post_types variable for checking the post type existence, meaning it returns either TRUE if the post type exists or FALSE if it doesn't exist. The post type must be a registered post type.

Usage

%%%<?php post_type_exists( $post_type ); ?>%%%

Parameters

tt$post_type/tt
(string) (required) Post type.
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.

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Return Value

(boolean) 
True on success, false on failure.

Examples

if ( post_type_exists( 'book' ) ) {
   echo 'the Book post type exists';
}
$exists = post_type_exists( 'post' );
// returns true
 
$exists = post_type_exists( 'page' );
// returns true
 
$exists = post_type_exists( 'book' );
// returns true if book is a registered post type
 
$exists = post_type_exists( 'xyz' );
// returns false if xyz is not a registered post type

Change Log

Source File

post_type_exists() is located in onlyincludecodewp-includes/post.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

taxonomy_exists()

Post Types: register_post_type, add_post_type_support, remove_post_type_support, post_type_supports, set_post_type, is_post_type_hierarchical, post_type_exists, get_post_type, get_post_type_object, get_post_types, get_post_type_capabilities, get_post_type_labels

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

/noinclude