csv using "and"

HumanList.php

<?php

/**
 * A class that formats an array of items into a human-readable string.
 *
 * When the class is invoked as a callable, it formats the provided array
 * by joining all elements with commas and adding "and" before the last item.
 * This is typically used for creating natural language representations of lists.
 *
 * Methods:
 *
 * - __invoke(array $items): Converts an array into a readable string format.
 */
class HumanList {

  public function __invoke(array $items): string {
    $last = array_pop($items);
    $items_string = implode(', ', $items);

    return sprintf('%s and %s', $items_string, $last);
  }
}