How does php distinguish between Simplified Chinese, Traditional Chinese, Japanese and Korean

According to the methods given on the Internet, it seems that Chinese, Japanese, and Korean can be distinguished, but how to distinguish simplified and traditional Chinese?

        $s = <<<'EOF'
"memolov 爱书 愛書 あいしょ 사랑 때문에 책이 되다",
EOF;
        echo $s.PHP_EOL;
        if(preg_match_all('/([\x{4e00}-\x{9fa5}]+)/u',$s,$m)){  //中文简体繁体
            echo "<pre>";
            print_r($m[1]);
            echo "</pre>";
        }

        if(preg_match_all('/([\x{0800}-\x{4e00}]+)/u',$s,$m)){ //日文
            echo "<pre>";
            print_r($m[1]);
            echo "</pre>";
        }
        if(preg_match_all('/([\x{AC00}-\x{D7A3}]+)/u',$s,$m)){  //韩文
            echo "<pre>";
            print_r($m[1]);
            echo "</pre>";
        }