MysqlndUhConnection::selectDb

(PECL mysqlnd-uh >= 1.0.0-alpha)

MysqlndUhConnection::selectDb — Selects the default database for database queries

说明

public bool MysqlndUhConnection::selectDb ( mysqlnd_connection $connection , string $database )

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