


Regarding the mysql character set, character_set_client=binary is set. In the case of gbk, the table description will be garbled_PHP tutorial
After the mysql link is established, set the encoding as follows:
mysql_query("SET character_set_connection=" . $GLOBALS['charset'] . ",character_set_results=" . $GLOBALS['charset'] . ",character_set_client=binary", $this->link);
However, it is created The table structure description is garbled:
mysql> show create table nw_admin_configG
* *************************** 1. row ********************* ******
Table: nw_admin_config
Create Table: CREATE TABLE `nw_admin_config` (
`name` varchar(30) NOT NULL DEFAULT '' COMMENT '��������' ,
`namespace` varchar(15) NOT NULL DEFAULT 'global' COMMENT '���������ռ�',
`value` text COMMENT '����ֵ',
`vtype` enum('string','array','object') NOT NULL DEFAULT 'string' COMMENT '����ֵ����',
`description` text COMMENT '���ý ���',
PRIMARY KEY (`namespace`,`name`)
) ENGINE=MyISAM DEFAULT CHARSET=gbk COMMENT='��վ���ñ�'
After investigation, it was found that character_set_client=binary was to blame:
mysql> show create table nw_admin_configG
**************************** 1. row ******** *******************
Table: nw_admin_config
Create Table: CREATE TABLE `nw_admin_config` (
`name` varchar(30) NOT NULL DEFAULT '' COMMENT 'Configuration name',
`namespace` varchar(15) NOT NULL DEFAULT 'global' COMMENT 'Configuration namespace',
`value` text COMMENT 'Cache value',
`vtype` enum('string','array','object') NOT NULL DEFAULT 'string' COMMENT 'Configuration value type',
`description` text COMMENT 'Configuration introduction',
PRIMARY KEY (`namespace`, `name`)
) ENGINE=MyISAM DEFAULT CHARSET=gbk COMMENT='Website Configuration Table'
However, if the character set I set is UTF8 and the table structure is also utf8, then even The above character_set_client=binary is used, and the description of the table structure is normal:
mysql> show create table nw_admin_configG
****************************** 1. row ************** *************
Table: nw_admin_config
Create Table: CREATE TABLE `nw_admin_config` (
`name` varchar(30) NOT NULL DEFAULT '' COMMENT 'Configuration name ',
`namespace` varchar(15) NOT NULL DEFAULT 'global' COMMENT 'Configuration namespace',
`value` text COMMENT 'Cache value',
`vtype` enum('string', 'array','object') NOT NULL DEFAULT 'string' COMMENT 'Configuration value type',
`description` text COMMENT 'Configuration introduction',
PRIMARY KEY (`namespace`,`name`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 COMMENT='Website configuration table'
And the strange thing is that the garbled characters only exist in the description in the table structure, but the inserted data is still normal in Chinese ~
I checked character_set_client=binary online and they said it was "mostly set to solve the garbled problem", but I didn't know that this description of the table structure was actually garbled. What exactly does this do? Why is the table structure different?

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