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PHP和js判断字符串是否是单个汉字

来源：站长源码网 作者：桑稚 时间：2026-07-05
浏览：11 收藏 点赞(0)
简介：JS const reg = /^[\u4e00-\u9fa5]$/; var keyword = "大"; if(reg.test(keyword) == false){ alert('只能是单个汉字'); } PHP $zi = '中国'; if(!preg_match('/^[\x{4e00}-\x{9fa5}]$/u', $zi)){ exit('只能是单个汉字'); } 上面的正则 有些字匹配不了，比如：㧟 /^[\x{3400

JS

const reg = /^[\u4e00-\u9fa5]$/;
var keyword = "大";
if(reg.test(keyword) == false){
     alert('只能是单个汉字');
}

PHP

$zi = '中国';
if(!preg_match('/^[\x{4e00}-\x{9fa5}]$/u', $zi)){
  exit('只能是单个汉字');
}

上面的正则 有些字匹配不了，比如：㧟

/^[\x{3400}-\x{9fff}]$/u

汉字在Unicode编码表中大体位于\u4e00至\u9fff之间，包括了常用汉字及简体字，而繁体字位于\u3400至\u4dbf之间。

合并这两个范围，可以匹配大部分汉字，包括简体和繁体。

标签：汉字字符串php
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