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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 愛書 愛書 あいしょ ?? ??? ?? ??",
EOF;
        echo $s.PHP_EOL;
        if(preg_match_all('/([\x{4e00}-\x{9fa5}]+)/u',$s,$m)){  //中文簡(jiǎn)體繁體
            echo "<pre>";
            print_r($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,$m)){  //韓文
            echo "<pre>";
            print_r($m[1]);
            echo "</pre>";
        }