How to Implement a Custom Card Output for LPS

The snippet used two filters: one for registering a custom output type that becomes available for the editor to select in the UI, and the second one that changes the output for the cards rendered with the shortcode you configure to use the custom output type.

<?php
/**
 * Hooks for Latest Post Shortcode 11.4.0
 *
 * @package textdomain
 */

declare( strict_types = 1 );

namespace IuliaCazanSnippets\LPS;

\add_filter( 'lps/card_output_types', __NAMESPACE__ . '\\lps_card_output_types', 1 );
\add_filter( 'lps/override_card', __NAMESPACE__ . '\\lps_override_card_output', 10, 5 );

/**
 * Change the list of card output types.
 *
 * @param  array $types Initial list of output types.
 * @return array
 */
function lps_card_output_types( array $types = [] ): array {
	// This is an example.
	$types['as-custom-card'] = __( 'Custom card', 'textdomain' );
	return $types;
}

/**
 * The custom output of the card.
 *
 * @param  string   $markup  The computed markup for the current card.
 * @param  string   $pattern The card pattern used for the initial markup.
 * @param  \WP_Post $object  The post object used for the card output.
 * @param  array    $args    The shortcode arguments.
 * @param  string   $type    The card output type.
 * @return string
 */
function lps_override_card_output( string $markup, string $pattern, \WP_Post $object, array $args, string $type = '' ): string {
	// Check for the custom output type and do the changes only for that one.
	if ( 'as-custom-card' === $type ) {
		// Apply the changes you want or replace the markup completely.
		// $markup = '...';
	}

	return $markup;
}