render_block │ filter-hook │ WP 5.0.0

Filters the content of a single block.

Usage

add_filter( 'render_block', 'wp_kama_render_block_filter', 10, 3 );

/**
 * Function for `render_block` filter-hook.
 * 
 * @param string   $block_content The block content.
 * @param array    $block         The full block, including name and attributes.
 * @param WP_Block $instance      The block instance.
 *
 * @return string
 */
function wp_kama_render_block_filter( $block_content, $block, $instance ){

	// filter...
	return $block_content;
}

$block_content(string): The block content.
$block(array): The full block, including name and attributes.
$instance(WP_Block): The block instance.

Changelog

Since 5.0.0	Introduced.
Since 5.9.0	The `$instance` parameter was added.

Where the hook is called

WP_Block::render()

interactivity_process_directives

pre_render_block

render_block_data

render_block_context

render_block

render_block_(name)

enqueue_empty_block_content_assets

wp-includes/class-wp-block.php 717

$block_content = apply_filters( 'render_block', $block_content, $this->parsed_block, $this );

Where the hook is used in WordPress

wp-includes/block-supports/background.php 131

add_filter( 'render_block', 'wp_render_background_support', 10, 2 );

wp-includes/block-supports/block-style-variations.php 269

add_filter( 'render_block', 'wp_render_block_style_variation_class_name', 10, 2 );

wp-includes/block-supports/block-visibility.php 132

add_filter( 'render_block', 'wp_render_block_visibility_support', 10, 2 );

wp-includes/block-supports/custom-css.php 153

add_filter( 'render_block', 'wp_render_custom_css_class_name', 10, 2 );

wp-includes/block-supports/dimensions.php 187

add_filter( 'render_block', 'wp_render_dimensions_support', 10, 2 );

wp-includes/block-supports/duotone.php 44

add_filter( 'render_block', array( 'WP_Duotone', 'render_duotone_support' ), 10, 3 );

wp-includes/block-supports/elements.php 307

add_filter( 'render_block', 'wp_render_elements_class_name', 10, 2 );

wp-includes/block-supports/layout.php 1450

add_filter( 'render_block', 'wp_render_layout_support_flag', 10, 2 );

wp-includes/block-supports/position.php 151

add_filter( 'render_block', 'wp_render_position_support', 10, 2 );

wp-includes/block-supports/settings.php 151

add_filter( 'render_block', '_wp_add_block_level_presets_class', 10, 2 );

wp-includes/block-supports/states.php 740

add_filter( 'render_block', 'wp_render_block_states_support', 10, 2 );

wp-includes/blocks/navigation.php 1726

add_filter( 'render_block', 'block_core_navigation_add_support_classes_to_container', 11, 2 );

wp-includes/default-filters.php 788

add_filter( 'render_block', 'wp_render_typography_support', 10, 2 );

wp-includes/default-filters.php 791

add_filter( 'render_block', 'wp_strip_inline_note_markers' );

wp-includes/script-loader.php 3456

add_filter( 'render_block', $callback_separate, 10, 2 );