安装mysql8.0之后，尝试使用php连接mysql，总是报PDO::__construct(): Server sent charset (255) unknown to the client. Please, report to the developers错误，网上找了很多资料，然而都没有多大用处。
查找了mysql官方说明文档才知道原来M8.0已经已经把默认字符集升级成ut8mb4了，于是找到my.cnf文件，修改如下：
1 [client]
2 port = 3306
3 socket = /tmp/mysql.sock
4 default-character-set = utf8
5
6 [mysql]
7 prompt="MySQL [\d]> "
8 no-auto-rehash
9 default-character-set = utf8
10
11 [mysqld]
12 port = 3306
13 socket = /tmp/mysql.sock
14 default_authentication_plugin = mysql_native_password
15 collation-server = utf8_unicode_ci
16
17 basedir = /usr/local/mysql
18 datadir = /data/mysql
19 pid-file = /data/mysql/mysql.pid
20 user = mysql
2 bind-address = 0.0.0.0
22 server-id = 1
23
24 init-connect = 'SET NAMES utf8'
25 character-set-server = utf8
然后使用PDO连接mysql
$db = array(
'host' => 'your host', //设置服务器地址
'port' => '3306', //设端口
'dbname' => 'your db name', //设置数据库名
'username' => 'your name', //设置账号
'password' => 'your pwd', //设置密码
'charset' => 'utf8', //设置编码格式
'dsn' => 'mysql:host=your host;dbname=your db name;port=3306;charset=utf8',
);
//连接
$options = array(
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION, //默认是PDO::ERRMODE_SILENT, 0, (忽略错误模式)
PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC, // 默认是PDO::FETCH_BOTH, 4
);
try{
$pdo = new PDO($db['dsn'], $db['username'], $db['password'], $options);
var_dump($pdo);
}catch(PDOException $e){
die('数据库连接失败:' . $e->getMessage());
}
结果如下：
object(PDO)#1 (0) { }