<?php$str= "中文";$par = "\x80-\xff";$par2= chr(0xa1).‘-‘.chr(0xff);/**使用$par和$par2两个表达示都能正确匹配。*/if(preg_match("/^[$par2]*$/",$str)){ echo "\$str是中文！";}else{ echo "\$str不是中文！";}?>