php正则判断中文字符

php正则判断中文字符

<script>ec(2);</script>

php教程正则判断中文字符

$str = "中国";
echo $str;
echo "

---

";

//if   (preg_match("/^[".chr(0xa1)."-".chr(0xff)."]+$/", $str)) {   //只能在gb2312情况下使用
if   (preg_match("/^[x7f-xff]+$/", $str)) { //兼容gb2312,utf-8
     echo "正确输入";
} else {
     echo "错误输入";
}
?>

双字节字符编码范围

1. gbk (gb2312/gb18030)
x00-xff gbk双字节编码范围
x20-x7f ascii
xa1-xff 中文 gb2312
x80-xff 中文 gbk

2. utf-8 (unicode)

u4e00-u9fa5 (中文)
x3130-x318f (韩文
xac00-xd7a3 (韩文)
u0800-u4e00 (日文)