wp-includes/class-wp-theme-json.php:3747Processes a style node and returns the same node without the insecure styles.
$inputarrayarray protected static function remove_insecure_styles( $input ) { $output = array(); $declarations = static::compute_style_properties( $input ); foreach ( $declarations as $declaration ) { if ( static::is_safe_css_declaration( $declaration['name'], $declaration['value'] ) ) { $path = static::PROPERTIES_METADATA[ $declaration['name'] ]; /* * Check the value isn't an array before adding so as to not * double up shorthand and longhand styles. */ $value = _wp_array_get( $input, $path, array() ); if ( ! is_array( $value ) ) { _wp_array_set( $output, $path, $value ); } } } // Ensure indirect properties not handled by `compute_style_properties` are allowed. static::remove_indirect_properties( $input, $output ); return $output; }Introduced in 5.9.0. 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.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.