WP_Block_Styles_Registry::register()publicWP 5.3.0

Registers a block style for the given block type.

If the block styles are present in a standalone stylesheet, register it and pass its handle as the style_handle argument. If the block styles should be inline, use the inline_style argument. Usually, one of them would be used to pass CSS styles. However, you could also skip them and provide CSS styles in any stylesheet or with an inline tag.

Method of the class: WP_Block_Styles_Registry{}

No Hooks.

Return

true|false. True if the block style was registered with success and false otherwise.

Usage

$WP_Block_Styles_Registry = new WP_Block_Styles_Registry();
$WP_Block_Styles_Registry->register( $block_name, $style_properties );
$block_name(string) (required)
Block type name including namespace.
$style_properties(array) (required)

Array containing the properties of the style.

  • name(string)
    The identifier of the style used to compute a CSS class.

  • label(string)
    A human-readable label for the style.

  • inline_style(string)
    Inline CSS code that registers the CSS class required for the style.

  • style_handle(string)
    The handle to an already registered style that should be enqueued in places where block styles are needed.

  • is_default(true|false)
    Whether this is the default style for the block type.

Changelog

Since 5.3.0 Introduced.

WP_Block_Styles_Registry::register() code WP 6.4.3

public function register( $block_name, $style_properties ) {

	if ( ! isset( $block_name ) || ! is_string( $block_name ) ) {
		_doing_it_wrong(
			__METHOD__,
			__( 'Block name must be a string.' ),
			'5.3.0'
		);
		return false;
	}

	if ( ! isset( $style_properties['name'] ) || ! is_string( $style_properties['name'] ) ) {
		_doing_it_wrong(
			__METHOD__,
			__( 'Block style name must be a string.' ),
			'5.3.0'
		);
		return false;
	}

	if ( str_contains( $style_properties['name'], ' ' ) ) {
		_doing_it_wrong(
			__METHOD__,
			__( 'Block style name must not contain any spaces.' ),
			'5.9.0'
		);
		return false;
	}

	$block_style_name = $style_properties['name'];

	if ( ! isset( $this->registered_block_styles[ $block_name ] ) ) {
		$this->registered_block_styles[ $block_name ] = array();
	}
	$this->registered_block_styles[ $block_name ][ $block_style_name ] = $style_properties;

	return true;
}