$a = '每天都要快樂 HAPPY'; $arr = utf8_str_split($a); print_r($arr); function utf8_str_split($str, $split_len = 1){ if (!preg_match('/^[0-9]+$/', $split_len) || $split_len < 1) return FALSE; $len = mb_strlen($str, 'UTF-8'); if ($len <= $split_len) return array($str); preg_match_all('/.{'.$split_len.'}|[^\x00]{1,'.$split_len.'}$/us', $str, $ar); return $ar[0]; } // 結果 Array ( [0] => 每 [1] => 天 [2] => 都 [3] => 要 [4] => 快 [5] => 樂 [6] => [7] => H [8] => A [9] => P [10] => P [11] => Y )