WP_Query::fill_query_vars( array $array )

	public function fill_query_vars($array) {
		$keys = array(
			'error'
			, 'm'
			, 'p'
			, 'post_parent'
			, 'subpost'
			, 'subpost_id'
			, 'attachment'
			, 'attachment_id'
			, 'name'
			, 'pagename'
			, 'page_id'
			, 'second'
			, 'minute'
			, 'hour'
			, 'day'
			, 'monthnum'
			, 'year'
			, 'w'
			, 'category_name'
			, 'tag'
			, 'cat'
			, 'tag_id'
			, 'author'
			, 'author_name'
			, 'feed'
			, 'tb'
			, 'paged'
			, 'meta_key'
			, 'meta_value'
			, 'preview'
			, 's'
			, 'sentence'
			, 'title'
			, 'fields'
			, 'menu_order'
			, 'embed'
		);

		foreach ( $keys as $key ) {
			if ( !isset($array[$key]) )
				$array[$key] = '';
		}

		$array_keys = array( 'category__in', 'category__not_in', 'category__and', 'post__in', 'post__not_in', 'post_name__in',
			'tag__in', 'tag__not_in', 'tag__and', 'tag_slug__in', 'tag_slug__and', 'post_parent__in', 'post_parent__not_in',
			'author__in', 'author__not_in' );

		foreach ( $array_keys as $key ) {
			if ( !isset($array[$key]) )
				$array[$key] = array();
		}
		return $array;
	}