PHP, Truncate string to a given length

trucator.php

/**
 * Cut string to lenght and add prefix
 * @param  string $string The string to truncate
 * @param  int    $length The amount of characters wanted
 * @param  string $prefix The prefix, default ...
 * @return string         The modified string
 */
function str_truncater($string, $length, $prefix = '...')
{
    return strlen($string) > $length ? substr($string, 0, $length).$prefix : $string;
}