is_singular() │ WP 1.5.0

Checks whether the post page is viewed (post, page, attachment, any post type). Conditional Tag.

This function combines conditional tags: is_single() + is_page() + is_attachment() + custom post types.

You can specify the specific type of post that you want to check in the $post_types parameter.

The logic of this function differs from is_single() in that it checks the individual post, while here it checks the type of post.

Use is_single() when you want to check a page by a specific ID, post name, but not by its type: post, page, attachment.

Used By: is_product()
1 time — 0.000001 sec (speed of light) | 50000 times — 0.01 sec (speed of light) | PHP 7.2.5, WP 5.0.2

No Hooks.

Return

true|false. Whether the query is for an existing single post or any of the given post types.

Usage

if( is_singular($post_types) ){
	// ...
}
$post_types(string/array)
Post type or array of post types.
Default: ''

Examples

0

#1 Check if this is regular post 

if ( is_singular( 'post' ) ){
	// viewing a regular post
}
0

#2 Different checks example 

// return true if any of the following: is_single(), is_page() or is_attachment().
is_singular();

// True when viewing a post of the Custom Post Type book.
is_singular( 'book' );

// True when viewing a post of the Custom Post Type newspaper or book.
is_singular( [ 'newspaper', 'book' ] );
0

#3 Content only on individual pages

With this code, you can display different ads units in the sidebar for posts pages and other pages (archives).

if ( is_singular() ) {
	// Advertising №1
}
else {
	// Advertising №2
}
0

#4 How to determine a single page of the specified type

This example shows how to determine a single page of the post type: book

if( is_singular('book') ){
	// Code that will only work on pages with the 'book' post type
}
0

#5 Determine multiple post types

An example showing how to pass several types of posts in an array.

if( is_singular( [ 'newspaper', 'book' ] ) ){
	// some code
}

Notes

Changelog

Since 1.5.0 Introduced.

Code of is_singular() WP 5.9.3

wp-includes/query.php 
function is_singular( $post_types = '' ) {
	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_singular( $post_types );
}

Conditional tags (page type and request)

Conditional tags (all)

Queries

Main Functions