mysqlnd_mbcharlen_gbk  470 mysqlnd/mysqlnd_charset.c 	{  28, "gbk", "gbk_chinese_ci", 1, 2, "", mysqlnd_mbcharlen_gbk, check_mb_gbk},
mysqlnd_mbcharlen_gbk  534 mysqlnd/mysqlnd_charset.c 	{  87, "gbk", "gbk_bin", 1, 2, "", mysqlnd_mbcharlen_gbk, check_mb_gbk},