PHP如何实现Unicode和Utf-8编码相互转换
原链接:https://www.jb51.net/article/70251.htm
/** * utf8字符转换成Unicode字符 * @param [type] $utf8_str Utf-8字符 * @return [type] Unicode字符 */ function utf8_str_to_unicode($utf8_str) { $unicode = 0; $unicode = (ord($utf8_str[0]) & 0x1F) << 12; $unicode |= (ord($utf8_str[1]) & 0x3F) << 6; $unicode |= (ord($utf8_str[2]) & 0x3F); return dechex($unicode); } /** * Unicode字符转换成utf8字符 * @param [type] $unicode_str Unicode字符 * @return [type] Utf-8字符 */ function unicode_to_utf8($unicode_str) { $utf8_str = ''; $code = intval(hexdec($unicode_str)); //这里注意转换出来的code一定得是整形,这样才会正确的按位操作 $ord_1 = decbin(0xe0 | ($code >> 12)); $ord_2 = decbin(0x80 | (($code >> 6) & 0x3f)); $ord_3 = decbin(0x80 | ($code & 0x3f)); $utf8_str = chr(bindec($ord_1)) . chr(bindec($ord_2)) . chr(bindec($ord_3)); return $utf8_str; }
$utf8_str = '我'; //这是汉字“你”的Unicode编码 $unicode_str = '4f6b'; //输出 6211 echo utf8_str_to_unicode($utf8_str) . " "; //输出汉字“你” echo unicode_str_to_utf8($unicode_str);