Create a string from a list of array values merged with comma and "and" as the last

PHP

/**
 * Create a string from a list of array values merged with comma
 * and "and" as the last.
 *
 * @param $array
 * @return string
 */
function implode_with_comma_and_and($array) {
  if (empty($array)) {
    return '';
  }
  // Prepare implode.
  $last = array_slice($array, -1);
  $first = join(', ', array_slice($array, 0, -1));
  $both = array_filter(array_merge([$first], $last), 'strlen');
  return implode(' and ', $both);
}

JavaScript

/**
  * Create a string from a list of array values merged with comma
  * and "and" as the last.
  *
  * @param array
  * @returns string
  */
function implodeWithCommaAndAnd(array) {
  if (array.length === 0) {
    return '';
  }

  return [array.slice(0, -1).join(', '), array.slice(-1)[0]].join(array.length < 2 ? '' : ' and ');
}