How does PHP determine whether it is Chinese or English?

#How does PHP determine whether it is Chinese or English?

In PHP, you can use regular rules to judge Chinese or English. The regular rules for judging English are "/^[^\x80-\xff] $/", and the regular rules for judging Chinese are "/^[" .chr(0xa1)."-".chr(0xff)."] $/", just judge the matching result when using it.

Usage examples

<?php




function ischinese($s){
 
    $allen = preg_match("/^[^/x80-/xff]+$/", $s);   //判断是否是英文
    $allcn = preg_match("/^[".chr(0xa1)."-".chr(0xff)."]+$/",$s);  //判断是否是中文
    if($allen){  
          return &#39;allen&#39;;  
    }else{  
      if($allcn){  
           return &#39;allcn&#39;;  
      }else{  
           return &#39;encn&#39;;  
      }  
    }  
           
}

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