Tag regex with persian characters

index.php

<?php
  $text = '#سلام_دنیا';
  if(preg_match('/\#([א-תآ-یÀ-ÿ一-龥а-яا-یa-z0-9\-_]{1,50})/iu',$text)){
    echo $text ." is tag\n";
  }else{
    echo $text ." is not tag\n";
  }