is_single() – Function | Developer.WordPress.org

Determines whether the query is for an existing single post.

Description

Works for any post type, except attachments and pages

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

For more information on this and similar theme functions, check out the Conditional Tags article in the Theme Developer Handbook.

Parameters

$postint|string|int[]|string[]optional: Post ID, title, slug, or array of such to check against.
Default:''

Return

bool Whether the query is for an existing single post.

More Information

See Also: is_singular()
Although is_single() will usually return true for attachments, this behavior should not be relied upon. It is possible for $is_page and $is_attachment to be true at the same time, and in that case $is_single will be false. For this reason, you should use is_attachment() || is_single() if you want to include attachments, or use is_singular() if you want to include pages too.

Source

function is_single( $post = '' ) {
	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_single( $post );
}

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Used by	Description
wp_title()`wp-includes/general-template.php`	Displays or retrieves page title for all areas of blog.
get_next_posts_page_link()`wp-includes/link-template.php`	Retrieves the next posts page link.
get_next_posts_link()`wp-includes/link-template.php`	Retrieves the next posts page link.
get_previous_posts_page_link()`wp-includes/link-template.php`	Retrieves the previous posts page link.
get_previous_posts_link()`wp-includes/link-template.php`	Retrieves the previous posts page link.
adjacent_posts_rel_link_wp_head()`wp-includes/link-template.php`	Displays relational links for the posts adjacent to the current post for single post pages.
get_boundary_post()`wp-includes/link-template.php`	Retrieves the boundary post.
get_body_class()`wp-includes/post-template.php`	Retrieves an array of the class names for the body element.
redirect_canonical()`wp-includes/canonical.php`	Redirects incoming links to the proper URL based on the site url.

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Changelog

Version	Description
1.5.0	Introduced.

User Contributed Notes

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Niloy – Codeixer 6 years ago

You must log in to vote on the helpfulness of this noteVote results for this note: 16You must log in to vote on the helpfulness of this note
```
// Run code only for Single post page
if ( is_single() && 'post' == get_post_type() ) {
  
}

//if it's not a specific post-type
if ( is_single() && 'portfolio' != get_post_type() ) {
  
}
```
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Codex 10 years ago

is_single();
// When any single Post page is being displayed.

is_single('17');
// When Post 17 (ID) is being displayed.

is_single(17);
// When Post 17 (ID) is being displayed. Integer parameter also works
is_single('Irish Stew');
// When the Post with post_title of "Irish Stew" is being displayed.

is_single('beef-stew');
// When the Post with post_name (slug) of "beef-stew" is being displayed.

is_single(array(17,'beef-stew','Irish Stew'));
// Returns true when the single post being displayed is either post ID 17,
// or the post_name is "beef-stew", or the post_title is "Irish Stew".
// Note: the array ability was added in version 2.5.

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w3-schools.com 4 years ago

You must log in to vote on the helpfulness of this noteVote results for this note: 0You must log in to vote on the helpfulness of this note
This is to demonstrate different kinds of Single
```
if ( is_single() ) {
    // Run code only for Single post-type 'post'
}

if ( is_page() ) {
    // Run code only for Single post-type 'page'
}


if ( is_singular() ) {
    // Run code for any Singular post of any post type   
}
```
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Nann Studio 7 years ago

You must log in to vote on the helpfulness of this noteVote results for this note: -3You must log in to vote on the helpfulness of this note
Enqueue a CSS stylesheet for any single Post page
```
if ( is_single() ) {
  // wp_enqueue_style( string $handle, string $src = '', array $deps = array(), string|bool|null $ver = false, string $media = 'all' )
}
```
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is_single( int|string|int[]|string[] $post = '' ): bool

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