/** * æååã«ãµãã²ã¼ããã¢ãå«ã¾ãããã©ããããã§ãã¯ãã¾ãã * * @param string $str ãã§ãã¯å¯¾è±¡ã®æåå * @return bool|string ãµãã²ã¼ããã¢ãå«ã¾ããªãå ´åfalseãå«ã¾ããå ´å該å½ã®æå */ function contains_surrogate_pair_character($str) { if ($str === NULL) return FALSE; // UTF-16ã¸å¤æããä¸æåãã¤ãã§ãã¯ãè¡ã $str_utf16 = mb_convert_encoding($str, "UTF-16", "UTF-8"); $str_length = mb_strlen($str_utf16, 'UTF-16'); for ($i = 0; $i < $str_length; $i++) { $chars = str_spl

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