Something

<?php require_once('../config.php');$text = ' <span lang="fr">You can search material:</span> ';$search = '/(<(?:lang|span) lang="[a-zA-Z0-9_-]*".*?>.+?<\/(?:lang|span)>)(\s*<(?:lang|span) lang="[a-zA-Z0-9_-]*".*?>.+?<\/(?:lang|span)>)+/is';$newtext = preg_replace_callback($search, 'multilangupgrade_impl', $text);print_object($text);print_object($newtext);function multilangupgrade_impl($langblock) {    print_object($langblock);    $searchtosplit = '/<(?:lang|span) lang="([a-zA-Z0-9_-]*)".*?>(.+?)<\/(?:lang|span)>/is';    preg_match_all($searchtosplit, $langblock[0], $rawlanglist);    $return = '';    foreach ($rawlanglist[1] as $index=>$lang) {        $return .= '<span lang="'.$lang.'" class="multilang">'.$rawlanglist[2][$index].'</span>';    }    return $return;}?>