MysqlndUhConnection::selectDb
(PECL mysqlnd-uh >= 1.0.0-alpha)
MysqlndUhConnection::selectDb — Selects the default database for database queries
说明
public
MysqlndUhConnection::selectDb (
mysqlnd_connection
$connection ,
string $database ) :
bool
Selects the default database for database queries.
参数
-
connection -
Mysqlnd connection handle. Do not modify!
-
database -
The database name.
返回值
Returns TRUE on success. Otherwise, returns FALSE
范例
Example #1 MysqlndUhConnection::selectDb() example
<?php
class proxy extends MysqlndUhConnection {
public function selectDb($res, $database) {
printf("%s(%s)\n", __METHOD__, var_export(func_get_args(), true));
$ret = parent::selectDb($res, $database);
printf("%s returns %s\n", __METHOD__, var_export($ret, true));
return $ret;
}
}
mysqlnd_uh_set_connection_proxy(new proxy());
$mysqli = new mysqli("localhost", "root", "", "test");
$mysqli->select_db("mysql");
?>
以上例程会输出：
proxy::selectDb(array ( 0 => NULL, 1 => 'mysql', )) proxy::selectDb returns true
参见
- mysqlnd_uh_set_connection_proxy() - Installs a proxy for mysqlnd connections
- mysqli_select_db() - 选择用于数据库查询的默认数据库
- mysql_select_db() - 选择 MySQL 数据库
