What to do if php Chinese intercepts garbled characters

The solution to intercepting garbled characters in Chinese: First, use the inconsistent binary ranges of ASCII encoding and Chinese encoding to distinguish them; then use the [substr()] function to intercept strings.

Solution to php Chinese interception of garbled characters:

The implementation principle is relatively simple, mainly using ASCII encoding The binary range of the Chinese encoding is inconsistent with that of the Chinese encoding to distinguish them, and then the substr() function is used to intercept the string.

The code I wrote is given below. Note: I only focus on utf-8 encoding. For other encodings, the reader can manually change the function to support other encodings.

<?php
header(&#39;content-type:text/html;charset=utf-8;&#39;);
$str = &#39;利要a-符e:r ttnx节小-子s区。vh;peh。例t来个oe体字n代gb节看t通c eu是的soS至什tna过码 t;Ie看C实e/,字le A来具8y么a)n=于ndg是r于 0tmt现码 e0ssf8单下s(uo别e的以ieh过aatx和t接要u几这看 nsw Ihrr用字 mgtts上就eg cAei的nwo码e跳h，t编&#39;;
/*
*在某篇文章中截取一段字符串，多余的用省略号...表示，并且防止中文乱码
*$param1 string要截取的字符串 $str  注意：这里是utf-8编码
*$param2 int截取字符串的长度 $len  
*返回值 成功返回所要截取的字符串，失败为空
*/
function str($str=&#39;&#39;,$len=0){
    //检查参数
    if(!is_string($str) || !is_int($len)){
        return &#39;&#39;;
    }
    $length = strlen($str);
    if($length <= 0 ){
        return &#39;&#39;;
    }
    if($len>=$length){
        return $str;
    }
    //初始化，统计字符串的个数，
    $count = 0;
    for($i=0;$i<$length;$i++){
        //达到个数跳出循环，$i即为要截取的长度
        if($count == $len){
            break;
        }
        $count++;
        //ord函数是获取字符串的ASCII编码，大于等于十六进制0x80的字符串即为中文字符串
        if(ord($str{$i}) >= 0x80){
            $i +=2;//中文编码的字符串的长度再加2
        }
    }
    //如果要截取的个数超过了字符串的总个数，那么我们返回全部字符串，不带省略号
    if($len > $count){
        return $str;
    }else{
        return substr($str,0,$i).&#39;...&#39;;
    }
}

The implementation of the above code is to use the ASCII code of single-byte characters less than 0x80. As for how many bytes to skip, it depends on the specific encoding.

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