is_category()WP 1.5.0

Conditional tag. Checks whether the category page is displayed or not.

It is a Boolean function, i.e. this function returns a true if the condition matches and false if not.

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

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

1 time — 0.000013 sec (very fast) | 50000 times — 0.01 sec (speed of light) | PHP 7.0.2, WP 4.4.1

No Hooks.


true|false. Whether the query is for an existing category archive page.


if( is_category( $category ) ){
	// code...
Category ID, name, slug, or array of Category IDs, names, and slugs.
Default: ''



#1 An example of different types of checks

// the function returns true if any category page is displayed.

is_category( '9' );
is_category( 9 );
// true if the category page with ID 9 is displayed.

is_category( 'Out there' );
// true if the category with the name 'Out there'.

is_category( 'out-there' );
// true if a category named 'out-there' is shown.

is_category( array( 9, 'blue-cheese', 'Stinky Cheeses' ) );
// Returns true if the category with ID 9 is shown or with name  
// 'blue-cheese', or with slug 'Stinky Cheeses'.


  • Global. WP_Query. $wp_query WordPress Query object.


Since 1.5.0 Introduced.

is_category() code WP 6.4.1

function is_category( $category = '' ) {
	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_category( $category );