wp-includes/class-wp-theme-json-resolver.php:947Adds variations sourced from block style variations files to the supplied theme.json data.
$dataarray$variationsarrayarray private static function inject_variations_from_block_style_variation_files( $data, $variations ) { if ( empty( $variations ) ) { return $data; } foreach ( $variations as $variation ) { if ( empty( $variation['styles'] ) || empty( $variation['blockTypes'] ) ) { continue; } $variation_name = $variation['slug'] ?? _wp_to_kebab_case( $variation['title'] ); foreach ( $variation['blockTypes'] as $block_type ) { // First, override partial styles with any top-level styles. $top_level_data = $data['styles']['variations'][ $variation_name ] ?? array(); if ( ! empty( $top_level_data ) ) { $variation['styles'] = array_replace_recursive( $variation['styles'], $top_level_data ); } // Then, override styles so far with any block-level styles. $block_level_data = $data['styles']['blocks'][ $block_type ]['variations'][ $variation_name ] ?? array(); if ( ! empty( $block_level_data ) ) { $variation['styles'] = array_replace_recursive( $variation['styles'], $block_level_data ); } $path = array( 'styles', 'blocks', $block_type, 'variations', $variation_name ); _wp_array_set( $data, $path, $variation['styles'] ); } } return $data; }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/class-wp-theme-json-resolver.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.