Changes how creators are listed depending on their numbers

multiple_creators.php

<?php

/**
 * One Creator: "Jane Doe"
 * Two creators: "Jane Doe and John Doe"
 * Three creators: "Jane Doe, John Doe, and Jim Doe"
 * Four or more: "Jane Doe et al."
 */
    if ($creators) {
        switch (count($creators) {
        case 1:
            $cite = $creators[0];
            break;
        case 2:
            $cite = "{$creators[0]} and {$creators[1]}";
            break;
        case 3:
            $cite = "{$creators[0]}, {$creators[1]}, and {$creators[2]}";
            break;
        default:
            $cite = "{$creators[0]}, et al.";
        }
    }