- mb_strlen: documentation ( source)
<?php
$str_0 = '[银光字幕组][哆啦A梦新番Doraemon][006][GB][2005.05.20]秘密间谍大作战&Hello!宇';
$str_1 = 'Hello Kitty no Happy Birthday (ハローキティとミミィのハッピーバースデー) OVA.mp';
$str_2 = 'ARR] Hello Kitty no Fushigi no Kuni no Alice (ハローキティの不思議の国の';
$str_3 = '2014.myHD.六福喜事.Hello Babies.粵語中字.AC-3.1920x1080-MYfun4U.mkv';
return mb_strlen($str_0, 'utf-8').'@'.mb_strlen($str_1, 'utf-8').'@'.mb_strlen($str_2, 'utf-8').'@'.mb_strlen($str_3, 'utf-8');