Podręcznik PHP
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# mysqli_select_db

(PHP 5)

mysqli_select_db

(no version information, might be only in CVS)

mysqli->select_db() -- Selects the default database for database queries

## Opis

Procedural style:

bool mysqli_select_db ( mysqli link, string dbname )

Object oriented style (method):

class mysqli {
bool select_db ( string dbname )
}

Selects the default database to be used when performing queries against the database connection.

> Notatka: This function should only be used to change the default database for the connection. You can select the default database with 4th parameter in mysqli_connect().

## Parametry

`link`

  Procedural style only: A link identifier returned by mysqli_connect() or mysqli_init()

`dbname`

  The database name.

## Zwracane wartości

Zwraca `TRUE` w przypadku sukcesu, `FALSE` w przypadku porażki.

## Przykłady

Przykład 1. Object oriented style

`<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "test");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
/* return name of current default database */
if ($result = $mysqli->query("SELECT DATABASE()")) {
$row = $result->fetch_row();
printf("Default database is %s.\n", $row[0]);
$result->close();
}
/* change db to world db */
$mysqli->select_db("world");
/* return name of current default database */
if ($result = $mysqli->query("SELECT DATABASE()")) {
$row = $result->fetch_row();
printf("Default database is %s.\n", $row[0]);
$result->close();
}
$mysqli->close();
?>`

Przykład 2. Procedural style

`<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "test");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
/* return name of current default database */
if ($result = mysqli_query($link, "SELECT DATABASE()")) {
$row = mysqli_fetch_row($result);
printf("Default database is %s.\n", $row[0]);
mysqli_free_result($result);
}
/* change db to world db */
mysqli_select_db($link, "world");
/* return name of current default database */
if ($result = mysqli_query($link, "SELECT DATABASE()")) {
$row = mysqli_fetch_row($result);
printf("Default database is %s.\n", $row[0]);
mysqli_free_result($result);
}
mysqli_close($link);
?>`

Powyższy przykład wyświetli:

    Default database is test.
    Default database is world.

## Patrz także

mysqli_connect()
mysqli_real_connect()

Poprzedni | Spis treści | Następny
mysqli_rpl_query_type | Początek rozdziału | mysqli_send_long_data