Block Pattern: Pros and Cons

add_action( 'init', function () {
    if ( ! function_exists( 'register_block_pattern' ) ) {
        return;
    }

    if ( ! WP_Block_Pattern_Categories_Registry::get_instance()->is_registered( 'wpide-sections' ) ) {
        register_block_pattern_category( 'wpide-sections', array( 'label' => 'Site Sections' ) );
    }

    $list = function ( $items, $mark ) {
        $html = '';
        foreach ( $items as $item ) {
            $html .= '<!-- wp:list-item --><li>' . $mark . ' ' . esc_html( $item ) . '</li><!-- /wp:list-item -->';
        }
        return '<!-- wp:list --><ul class="wp-block-list">' . $html . '</ul><!-- /wp:list -->';
    };

    $content = '<!-- wp:columns --><div class="wp-block-columns">'
        . '<!-- wp:column --><div class="wp-block-column"><!-- wp:heading {"level":3} --><h3 class="wp-block-heading">Pros</h3><!-- /wp:heading -->' . $list( array( 'Easy to set up', 'Great value for money', 'Excellent support' ), '✔' ) . '</div><!-- /wp:column -->'
        . '<!-- wp:column --><div class="wp-block-column"><!-- wp:heading {"level":3} --><h3 class="wp-block-heading">Cons</h3><!-- /wp:heading -->' . $list( array( 'No mobile app yet', 'Limited integrations' ), '✖' ) . '</div><!-- /wp:column -->'
        . '</div><!-- /wp:columns -->';

    register_block_pattern( 'wpide/pros-cons', array(
        'title'       => 'Pros and cons',
        'description' => 'Two lists comparing advantages and drawbacks.',
        'categories'  => array( 'wpide-sections' ),
        'keywords'    => array( 'pros', 'cons', 'review', 'comparison' ),
        'content'     => $content,
    ) );
} );