本文实例讲述了php实现过滤字符串中的中文和数字。分享给大家供大家参考。具体实现方法如下：
function getChinese($string,$encode=GBK) {
switch($encode){
case GBK :$codelength=2;break;
case GB2312 :$codelength=3;break;
case UTF-8 :$codelength=3;break;
case UTF-16 :$codelength=4;break;
}
$tmpstr = '';
$arr = array(1,
