How to determine whether it is Chinese or English in php

The way PHP determines whether it is Chinese or English is to use the preg_match() function, which can perform a regular expression matching. The specific usage method is: [preg_match("/^[^/x80-/xff] $/", $s)].

Function introduction:

(Recommended tutorial: php tutorial)

preg_match function is used Perform a regular expression match.

This function returns the number of matches of pattern. Its value will be 0 (no match) or 1 because preg_match() will stop searching after the first match. preg_match_all() differs from this in that it searches for the subject until it reaches the end. If an error occurs preg_match() returns FALSE.

Function syntax:

int preg_match(string $pattern, string $subject[, array &$matches[, int $flags = 0[, int $offset = 0]]])

Code implementation:

static 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 'allen';  
        }else{  
              if($allcn){  
                   return 'allcn';  
              }else{  
                   return 'encn';  
              }  
        }  
               
   }

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