user_can

/**
 * Returns whether the author of the supplied post has the specified capability.
 *
 * This function also accepts an ID of an object to check against if the capability is a meta capability. Meta
 * capabilities such as `edit_post` and `edit_user` are capabilities used by the `map_meta_cap()` function to
 * map to primitive capabilities that a user or role has, such as `edit_posts` and `edit_others_posts`.
 *
 * Example usage:
 *
 *     author_can( $post, 'edit_posts' );
 *     author_can( $post, 'edit_post', $post->ID );
 *     author_can( $post, 'edit_post_meta', $post->ID, $meta_key );
 *
 * @since 2.9.0