How to determine whether a string is Chinese or numeric in php

php method to determine whether a string is Chinese or numeric: 1. Judge by "if (preg_match("/^[\x7f-\xff] $/", $str)){...}" Whether it is Chinese; 2. Use the "function checkStr($str){...}" method to determine the string type.

The operating environment of this tutorial: Windows 10 system, PHP version 8.1, DELL G3 computer

How to determine whether a string is Chinese in php Or numbers?

php Determine whether it is Chinese/English/numeric sample code

The judgment of Chinese, English, and numeric is also often used in projects, as follows A good example, you can refer to it, it may be helpful

The code is as follows:

$str='asb天水市12';
if (preg_match("/^[\x7f-\xff]+$/", $str)){
echo '全部是汉字';
}else {
echo '不全是汉字';
}
/**
PHP自带的判断是否是中文，
eregi('[^\x00-\x7F]', $str ) //中文
eregi('[0-9]', $str) //数字
eregi('[a-zA-Z]', $str)//英文
*/
if (eregi('[^\x00-\x7F]', $str) || eregi('[0-9]', $str) ||　eregi('[a-zA-Z]', $str)){
echo &#39;你输入的为中英文数字的并合体哦!&#39;.&#39;<br>&#39;;
echo "长度:".strlen($str);
}
/ **
下面这两个方法是用来判断是否是英文汉字和数字组成的字符串，
或者全部是中文组成的字符串 用的变量$str还是本文开头的变量
*/
if (preg_match_all("/^([\x81-\xfe][\x40-\xfe])+$/", $str, $match)) {
echo &#39;全部是汉字&#39;;
} else {
echo &#39;不全是汉字&#39;;
}
if (preg_match("/([\x81-\xfe][\x40-\xfe])/", $str, $match)) {
echo &#39;含有汉字&#39;;
} else {
echo &#39;不含有汉字&#39;;
}
/**
此为js方法，判断了一个汉字占两个字节，一个中文或数字占一个，使用编码为UTF-8
*/
<script>
var leng = {};
var value = document.forms[0].name.value;
jmz.GetLength = function(str) {
var realLength = 0, len = str.length, charCode = -1;
for (var i = 0; i < len; i++) {
charCode = str.charCodeAt(i);
if (charCode >= 0 && charCode <= 128) realLength += 1;
else realLength +=2;
}
return realLength;
};
alert(leng.GetLength(value))
</script>
function checkStr($str){
$output=&#39;&#39;;
$a=ereg(&#39;[&#39;.chr(0xa1).&#39;-&#39;.chr(0xff).&#39;]&#39;, $str);
$b=ereg(&#39;[0-9]&#39;, $str);
$c=ereg(&#39;[a-zA-Z]&#39;, $str);
if($a && $b && $c){ $output=&#39;汉字数字英文的混合字符串&#39;;}
elseif($a && $b && !$c){ $output=&#39;汉字数字的混合字符串&#39;;}
elseif($a && !$b && $c){ $output=&#39;汉字英文的混合字符串&#39;;}
elseif(!$a && $b && $c){ $output=&#39;数字英文的混合字符串&#39;;}
elseif($a && !$b && !$c){ $output=&#39;纯汉字&#39;;}
elseif(!$a && $b && !$c){ $output=&#39;纯数字&#39;;}
elseif(!$a && !$b && $c){ $output=&#39;纯英文&#39;;}
return $output;
}
echo checkStr(&#39;5爱u&#39;);

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