Verify that the Zhong Wenjing expression php and JavaScript

JavaScript form validation is Chinese, determines whether an input is Chinese and is implemented through regular expressions.
Check to see if it is Chinese

function Ischn (str) {
var reg =/^[u4e00-u9fa5]+$/;
if (!reg.test (str)) {
return false;
}
return true;
}

if (Escape (str). IndexOf ("%u")!=-1) alert ("contains Chinese characters"); else alert ("All characters");

Write it directly in the input.

<input onkeyup= "Value=value.replace (/[^u4e00-u9fa5]/g, ')" >

PHP Tutorials Validate Zhong Wenjing expressions

if (Escape (str). IndexOf ("%u")!=-1) alert ("contains Chinese characters"); else alert ("All characters");

<?php
$shouji = "haha haha";
if (!preg_match ("/^[x80-xff]{6,30}$/", $shouji)) {
echo "NoNoNo";
}
else {
echo "Yesyesyes";
}
?>