Register a WordPress Pattern

event-card-pattern.php

<?php
/**
* Title: Event Card
* Slug: text-domain/event-card
* Categories: cards
*/
?>
<!-- wp:group {"className":"specifica-opera","layout":{"type":"default"}} -->
<div class="wp-block-group specifica-opera"><!-- wp:heading {"textColor":"hc_azzurro"} -->
<h2 class="has-hc-azzurro-color has-text-color">Missa Brevis in La Maggiore BWV 234</h2>
<!-- /wp:heading -->

<!-- wp:heading {"level":3,"textColor":"hc_azzurro"} -->
<h3 class="has-hc-azzurro-color has-text-color">Cast e team di produzione</h3>
<!-- /wp:heading -->

<!-- wp:paragraph -->
<p><strong>Direzione d'orchestra</strong>: Arman Azemoon<br><strong>Regia</strong>: Giovanni Del Monte<br><strong>Direzione del coro</strong>: Arman Azemoon<br><strong>Pianoforte</strong>: Elisabetta Ferri<br><strong>Flauto</strong>: Laura Pontecorvo<br><strong>Soprano</strong>: Rosaria Angotti<br><strong>Alto</strong>: Simona Braida<br><strong>Basso</strong>: Roberto Curione</p>
<!-- /wp:paragraph -->

<!-- wp:heading {"level":3,"textColor":"hc_azzurro"} -->
<h3 class="has-hc-azzurro-color has-text-color">Informazioni ensemble</h3>
<!-- /wp:heading -->

<!-- wp:paragraph -->
<p><strong>Orchestra</strong>: Orchestra Barocca HT Classical<br><strong>Coro</strong>: L'Ottava Giusta</p>
<!-- /wp:paragraph --></div>
<!-- /wp:group -->

register-block-patterns-and-categories.php

<?php
/**
 * Registers block patterns and categories.
 */
function mb_register_block_pattern_categories() {
	
  $block_pattern_categories = array(
		'cards'   => array( 'label' => __( 'Cards', 'text-domain' ) )
	);

	/**
	 * Filters the theme block pattern categories.
	 */
	$block_pattern_categories = apply_filters( 'mb_block_pattern_categories', $block_pattern_categories );

	foreach ( $block_pattern_categories as $name => $properties ) {
		if ( ! WP_Block_Pattern_Categories_Registry::get_instance()->is_registered( $name ) ) {
			register_block_pattern_category( $name, $properties );
		}
	}

}

add_action( 'init', 'mb_register_block_pattern_categories', 9 );