PHPだけでカスタムブロックを作成。古いショートコードよ、さらば 🥳

function testimonial_shortcode( $atts, $content = '' ) {
    $atts = shortcode_atts( [
        'name'    => '',
        'company' => '',
        'stars'   => 5,
    ], $atts );
 
    $stars_count = max( 1, min( 5, intval( $atts['stars'] ) ) );
    $stars_html  = str_repeat( '★', $stars_count )
                 . str_repeat( '☆', 5 - $stars_count );
 
    return sprintf(
        '<blockquote class="testimonial">
            <p class="testimonial__stars">%s</p>
            <p class="testimonial__body">%s</p>
            <footer class="testimonial__attribution">
                <strong>%s</strong>%s
            </footer>
        </blockquote>',
        esc_html( $stars_html ),
        wp_kses_post( $content ),
        esc_html( $atts['name'] ),
        $atts['company'] ? ', ' . esc_html( $atts['company'] ) : ''
    );
}
add_shortcode( 'testimonial', 'testimonial_shortcode' );Copy

[testimonial name="Sarah K." company="Acme Corp" stars="4"]
	Saved us hours every week.
[/testimonial]Copy

function my_plugin_register_testimonial_block() {
    register_block_type(
        'my-plugin/testimonial', // Block name: namespace/slug
        array(
            'title'      => 'Testimonial', // Shown in the block inserter
            'attributes' => array(
                // string attributes generate a text input in the sidebar
                'name'    => array(
                    'type'    => 'string',
                    'default' => '',
                ),
                'company' => array(
                    'type'    => 'string',
                    'default' => '',
                ),
                // integer attributes generate a number input
                'stars'   => array(
                    'type'    => 'integer',
                    'default' => 5,
                ),
                'body'    => array(
                    'type'    => 'string',
                    'default' => '',
                ),
            ),
            // render_callback is the PHP function that outputs the block's HTML
            'render_callback' => function ( $attributes ) {
                $stars_count = max( 1, min( 5, intval( $attributes['stars'] ) ) );
                $stars_html  = str_repeat( '★', $stars_count )
                             . str_repeat( '☆', 5 - $stars_count );
 
                // Translatable string for screen readers — standard WordPress i18n, nothing extra needed
                /* translators: %d: star rating out of 5 */
                $stars_label = sprintf( __( '%d out of 5 stars', 'my-plugin' ), $stars_count );
 
                return sprintf(
                    '<blockquote %s>
                        <p class="testimonial__stars" aria-label="%s">%s</p>
                        <p class="testimonial__body">%s</p>
                        <cite class="testimonial__attribution">
                            <strong>%s</strong>%s
                        </cite>
                    </blockquote>',
                    // Merges your class with editor-added colour, spacing, and typography styles
                    get_block_wrapper_attributes( array( 'class' => 'testimonial wp-block-quote' ) ),
                    esc_attr( $stars_label ),
                    esc_html( $stars_html ),
                    wp_kses_post( $attributes['body'] ),
                    esc_html( $attributes['name'] ),
                    $attributes['company'] ? ', ' . esc_html( $attributes['company'] ) : ''
                );
            },
            'supports' => array(
                // The key flag — tells WordPress to handle JS registration automatically
                'autoRegister' => true, 
                // The rest unlock native colour, typography, and spacing panels in the sidebar
                'color'      => array(
                    'background' => true,
                    'text'       => true,
                ),
                'typography' => array(
                    'fontSize' => true,
                ),
                'spacing'    => array(
                    'padding' => true,
                    'margin'  => true,
                ),
            ),
        )
    );
}
add_action( 'init', 'my_plugin_register_testimonial_block' );Copy

/* translators: %d: star rating out of 5 */
$stars_label = sprintf( __( '%d out of 5 stars', 'my-plugin' ), $stars_count );Copy