block_core_heading_render() │ WP 6.2.0

Adds a wp-block-heading class to the heading block content.

For example, the following block content: <h2 class="align-left">Hello World</h2>

Would be transformed to: <h2 class="align-left wp-block-heading">Hello World</h2>

No Hooks.

Returns

String. The content of the block being rendered.

Usage

block_core_heading_render( $attributes, $content );

$attributes(array) (required)

Attributes of the block being rendered.

$content(string) (required)

Content of the block being rendered.

Changelog

block_core_heading_render() block core heading render code ^{WP 6.9.1}

function block_core_heading_render( $attributes, $content ) {
	if ( ! $content ) {
		return $content;
	}

	$p = new WP_HTML_Tag_Processor( $content );

	$header_tags = array( 'H1', 'H2', 'H3', 'H4', 'H5', 'H6' );
	while ( $p->next_tag() ) {
		if ( in_array( $p->get_tag(), $header_tags, true ) ) {
			$p->add_class( 'wp-block-heading' );
			break;
		}
	}

	return $p->get_updated_html();
}