Entities Non ASCII characters

MultiBytesEntities.php

<?php
/**
 * Entities the Multibytes string
 *  Iconv must be enable to use this function work properly
 *
 * @param string $string the string to detect multibytes
 * @param boolean $entities  true if want to entity the output
 * @return string
 */
function multibyteEntities($string, $entities = true)
{
    static $iconv = null;
    if (!isset($iconv)) {
        // safe resouce check multiple call
        $iconv = function_exists('iconv');
    }

    if (is_array($string)) {
        foreach ($string as $key => $value) {
            $string[$key] = multibyteEntities($value, $entities);
        }

        return $string;
    }

    if (is_object($string)) {
        foreach (get_object_vars($string) as $key => $value) {
            $string->{$key} = multibyteEntities($value, $entities);
        }
        return $string;
    }

    if (!$iconv) { // add \n\r\t as ASCII
        return $entities ? htmlentities(html_entity_decode($string)) : $string;
    }

    /**
     * Work Safe with Parse 4096 Bit | 4KB data split for regex callback & safe memory usage
     * that maybe fail on very long string
     */
    if (strlen($string) >= 4096) {
        return implode('', multibyteEntities(str_split($string, 4096), $entities));
    }

    return preg_replace_callback('/[\x{80}-\x{10FFFF}]/u', function ($m) {
        $char = current($m);
        $utf  = iconv('UTF-8', 'UCS-4//IGNORE', $char);
        return sprintf("&#x%s;", ltrim(strtolower(bin2hex($utf)), "0"));
    }, ($entities ? htmlentities(html_entity_decode($string)) : $string));
}