php如何区分中文，日文，韩文，

回复讨论(解决方案)

根据其内码判断

$s = <<<'EOF'"memolov 爱书 愛書 あいしょ 사랑 때문에 책이 되다",EOF;if(preg_match_all('/([\x{4e00}-\x{9fa5}]+)/u',$s,$m)){	echo "
";	print_r($m[1]);	echo "
";}if(preg_match_all('/([\x{0800}-\x{4e00}]+)/u',$s,$m)){	echo "
";	print_r($m[1]);	echo "
";}if(preg_match_all('/([\x{AC00}-\x{D7A3}]+)/u',$s,$m)){	echo "
";	print_r($m[1]);	echo "
";}/*Array(    [0] => 爱书    [1] => 愛書)Array(    [0] => あいしょ)Array(    [0] => 사랑    [1] => 때문에    [2] => 책이    [3] => 되다)*/