<?php $str = '我这是怎么了'; echo preg_replace("/([u4e00-u9fa5].)/","<font color=red>1</font>",$str); $test = "php编程"; if (preg_match("/^[x{4e00}-x{9fa5}]+$/u",$test)) { print("该字符串全部是中文"); } else { print("该字符串不全部是中文"); } ?>
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