WordPress开发手册:in_category()

函数原型

in_category( int|string|int[]|string[] $category, int|WP_Post $post = null ): bool

Checks if the current post is within any of the given categories.

未弃用

$category int|string|int[]|string[] Required: Category ID, name, slug, or array of such to check against.
$post int|WP_Post Optional: Post to check. Defaults to the current post.
Default: null

bool True if the current post is in any of the given categories.

File: wp-includes/category-template.php.

function in_category( $category, $post = null ) {
	if ( empty( $category ) ) {
		return false;
	}

	return has_category( $category, $post );
}

Changelog
Version	Description
2.7.0	The `$post` parameter was added.
1.2.0	Introduced.

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