wp-includes/block-supports/block-style-variations.php:211Ensures the variation block support class name generated and added to block attributes in the render_block_data filter gets applied to the block's markup.
$block_contentstring$blockarraystringfunction wp_render_block_style_variation_class_name( $block_content, $block ) { if ( ! $block_content || empty( $block['attrs']['className'] ) ) { return $block_content; } /* * Matches a class prefixed by `is-style`, followed by the * variation slug, then `--`, and finally an instance number. */ preg_match( '/\bis-style-(\S+?--\d+)\b/', $block['attrs']['className'], $matches ); if ( empty( $matches ) ) { return $block_content; } $tags = new WP_HTML_Tag_Processor( $block_content ); if ( $tags->next_tag() ) { /* * Ensure the variation instance class name set in the * `render_block_data` filter is applied in markup. * See `wp_render_block_style_variation_support_styles`. */ $tags->add_class( $matches[0] ); } return $tags->get_updated_html();}Introduced in 6.6.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/block-supports/block-style-variations.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.