get_query_pagination_arrow

get_query_pagination_arrow函数是一个WordPress函数，用于检索查询中下一页或上一页的分页链接: 这个函数接受一个可选的链接文本参数，并返回到下一页或上一页的链接。

帮助函数，根据`QueryPagination`上下文提供的`paginationArrow`，为`QueryPaginationNext`和`QueryPaginationPrevious`区块返回适当的分页箭头HTML。

它被用于QueryPaginationNext和QueryPaginationPrevious区块。

function get_query_pagination_arrow( $block, $is_next ) {
	$arrow_map = array(
		'none'    => '',
		'arrow'   => array(
			'next'     => '→',
			'previous' => '←',
		),
		'chevron' => array(
			'next'     => '»',
			'previous' => '«',
		),
	);
	if ( ! empty( $block->context['paginationArrow'] ) && array_key_exists( $block->context['paginationArrow'], $arrow_map ) && ! empty( $arrow_map[ $block->context['paginationArrow'] ] ) ) {
		$pagination_type = $is_next ? 'next' : 'previous';
		$arrow_attribute = $block->context['paginationArrow'];
		$arrow           = $arrow_map[ $block->context['paginationArrow'] ][ $pagination_type ];
		$arrow_classes   = "wp-block-query-pagination-$pagination_type-arrow is-arrow-$arrow_attribute";
		return "<span class='$arrow_classes' aria-hidden='true'>$arrow</span>";
	}
	return null;
}