- var_dump: documentation ( source)
- mb_detect_encoding: documentation ( source)
<?php
$str2 = "占楼";
var_dump(mb_detect_encoding($str2, 'CP936', true));
var_dump(mb_detect_encoding($str2, 'EUC-CN', true));
var_dump(mb_detect_encoding($str2, 'UTF-8', true));