render_block_core_query_no_results
函数
      render_block_core_query_no_results ( $attributes, $content, $block )    
  - 参数
 - 
- 
                (array)
$attributes
Block attributes.- Required: 是
 
 - 
                (string)
$content
Block default content.- Required: 是
 
 - 
                (WP_Block)
$block
Block instance.- Required: 是
 
 
 - 
                (array)
 
- 返回值
 - 
- (string) Returns the wrapper for the no results block.
 
 
- 定义位置
 - 
- 
                                  wp-includes/blocks/query-no-results.php
, line 17 
 - 
                                  wp-includes/blocks/query-no-results.php
 
- 引入
 - –
 
- 弃用
 - –
 
Renders the `core/query-no-results` block on the server.
function render_block_core_query_no_results( $attributes, $content, $block ) {
	if ( empty( trim( $content ) ) ) {
		return '';
	}
	$page_key = isset( $block->context['queryId'] ) ? 'query-' . $block->context['queryId'] . '-page' : 'query-page';
	$page     = empty( $_GET[ $page_key ] ) ? 1 : (int) $_GET[ $page_key ];
	// Override the custom query with the global query if needed.
	$use_global_query = ( isset( $block->context['query']['inherit'] ) && $block->context['query']['inherit'] );
	if ( $use_global_query ) {
		global $wp_query;
		$query = $wp_query;
	} else {
		$query_args = build_query_vars_from_query_block( $block, $page );
		$query      = new WP_Query( $query_args );
	}
	if ( $query->have_posts() ) {
		return '';
	}
	if ( ! $use_global_query ) {
		wp_reset_postdata();
	}
	return sprintf(
		'%2$s',
		get_block_wrapper_attributes(),
		$content
	);
}
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