Takes array of people and outputs a single name, 2 names separated by an ampersand, or 3 or more names separated by a comma and the last one by an ampersand

person_list.php

function person_list( $personArray ) {
  $personCount = count( $personArray );

  for ( $i = 0; $i < $personCount; $i++ ) {
    $name       = $personArray[$i]['name'];
    $personHTML .= "<span class=\"name\">{$name}";

    if ( $personCount == 2 ){
      if ( $i < ($personCount - 1 ) ) {
        $personHTML .= " &amp; ";
      }
    } elseif ( $personCount > 2 ) {
      if ( $i < ($personCount - 2 ) ) {
        $personHTML .= ", ";
      } elseif ( $i < ( $personCount - 1 ) ) {
        $personHTML .= ", &amp; ";
      }
    }
    $personHTML .= "</span>";
  }
  return $personHTML;
}