array( 'count' => array( 'type' => 'number', 'default' => 0, ), ), 'render_callback' => static function ( $attributes ) { $count = isset( $attributes['count'] ) ? absint( $attributes['count'] ) : 0; // Simulate an empty response when count is over maximum value = 10. if ( $count > 10 ) { return ''; } return sprintf( '

Coffee count: %d

', $count ); }, 'editor_script_handles' => array( 'server-side-rendered-block' ), ) ); // PHP-only block with auto_register flag, will be auto-registered without JS code register_block_type( 'test/auto-register-block', array( 'title' => 'Auto Register Test Block', 'icon' => 'admin-generic', 'category' => 'widgets', 'description' => 'A test block for auto-registration', 'keywords' => array( 'serverblock', 'autotest' ), 'render_callback' => static function ( $attributes ) { $wrapper_attributes = get_block_wrapper_attributes( array( 'class' => 'auto-register-example', ) ); return sprintf( '

Auto-register block content

Background: %2$s

', $wrapper_attributes, isset( $attributes['backgroundColor'] ) ? esc_html( $attributes['backgroundColor'] ) : 'default' ); }, 'supports' => array( 'auto_register' => true, 'color' => array( 'background' => true, 'text' => false, ), ), ) ); // PHP-only block WITHOUT auto_register flag, will NOT be auto-registered without JS code register_block_type( 'test/php-only-no-auto-register', array( 'api_version' => 3, 'render_callback' => static function () { return '

PHP-only block content

'; }, ) ); } );