mysql query error mysql5 write and read garbled solution

The example I wrote

Copy the code The code is as follows:

require("adodb/adodb.inc.php");
$c
$conn->connect("localhost"," root","2027205","bh38") or die("Connection failed");
$conn->execute("set names gb2312");
$conn->execute("INSERT INTO `vv` (`cc`) VALUES ('I don’t know if it will work if I change the encoding');") or die("Error");
$rc=$conn->execute("select * from vv");
while (!$rc->EOF)
{
echo($rc->fields["cc"]);
$rc->movenext();
}
?>

Of course we can also pass The following command modifies the character set of the database
alter database da_name default character set 'charset'.
The client sends it in gbk format. You can use the following configuration:
SET character_set_client='gbk'
SET character_set_c
SET character_set_results='gbk'
This configuration is equivalent to SET NAMES 'gbk'.
Now operate the database you just created
mysql> use test;
Database changed
mysql> insert into mysqlcode values(null,'php enthusiast');
ERROR 1406 (22001): Data too long for column 'content' at row 1
The character set is not specified as gbk, an error occurred during insertion
mysql> set names 'gbk';
Query OK, 0 rows affected (0.02 sec)
The specified character set is gbk
mysql> insert into mysqlcode values(null,' php lovers');
Query OK, 1 row affected (0.00 sec)
Insertion successful
mysql> select * from mysqlcode;
+----+-----------+
| id | content |
+----+-----------+
| 1 | PHP lover |
+----+-----------+
1 row in set (0.00 sec)
When reading without specifying the character set gbk, garbled characters will also appear, as follows
mysql> select * from mysqlcode;
+----+----------+
| id | content |
+----+---------+
| 1 | php??? |
+----+---------+
1 row in set (0.00 sec)

The above introduces the solution to mysql query error when writing and reading garbled characters in mysql5, including the content of mysql query error. I hope it will be helpful to friends who are interested in PHP tutorials.