String sanitizer function

sanitizer.php

<?php

/**
 * Sanitize a string. PHP 5.3 or lower version.
 *
 * See requirements here: http://www.php.net/manual/en/iconv.requirements.php
 * 
 * @param string $str string to sanitize
 * @param array $replace special strings/characters to be replaced with space
 * @param string $delimiter delimeter character insteand of whitespaces
 * @return string sanitized string
 */
function sanitize($str, $replace = array(), $delimiter = '-')
{
    $str = trim($str);

    if (!empty($replace)) {
        $str = str_replace((array) $replace, ' ', $str);
    }

    $clean = iconv('UTF-8', 'ASCII//TRANSLIT', $str);
    $clean = preg_replace("/[^\w\/_|+ -]/", '', $clean);
    $clean = strtolower(trim($clean, '-'));
    $clean = preg_replace("/[\/_|+ -]+/", $delimiter, $clean);

    return $clean;
}

/**
 * Sanitize a string. PHP 5.4 and up version.
 *
 * See requirements here: http://www.php.net/manual/en/transliterator.transliterate.php
 * 
 * @param string $str string to sanitize
 * @param array $replace special strings/characters to be replaced with space
 * @param string $delimiter delimeter character insteand of whitespaces
 * @return string sanitized string
 */
function sanitize($str, $replace = array(), $delimiter = '-')
{
    $str = trim($str);

    if (!empty($replace)) {
        $str = str_replace((array) $replace, ' ', $str);
    }

    $clean = transliterator_transliterate('NFD; [:Nonspacing Mark:] Remove; NFC', $str);
    $clean = preg_replace("/[^a-zA-Z0-9_|+ -]/", '', $clean);
    $clean = strtolower(trim($clean, '-'));
    $clean = preg_replace("/[_|+ -]+/", $delimiter, $clean);

    return $clean;
}