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filter is not described

render_block_(name) filter-hook . WP 5.7.0

Filters the content of a single block.

The dynamic portion of the hook name, $name, refers to the block name, e.g. "core/paragraph".


add_filter( 'render_block_(name)', 'filter_function_name_1791', 10, 2 );
function filter_function_name_1791( $block_content, $block ){
	// filter...

	return $block_content;
The block content about to be appended.
The full block, including name and attributes.


Since 5.7.0 Introduced.

Where the hook is called

wp-includes/class-wp-block.php 257
$block_content = apply_filters( "render_block_{$this->name}", $block_content, $this->parsed_block );

Where in WP core the hook is used WordPress

wp-includes/blocks/latest-posts.php 236
add_filter( 'render_block_data', 'block_core_latest_posts_migrate_categories' );