select-db
mysqli::select_db
mysqli_select_db
Selects the default database for database queries
ENTITY
ENTITY
public
bool
mysqli::select_db
string
database
ENTITY
bool
mysqli_select_db
mysqli
mysql
string
database
Selects the default database to be used when performing queries against the database connection.
[!NOTE] This function should only be used to change the default database for the connection. You can select the default database with the 4th parameter in
mysqli_connect.
ENTITY
database
The database name.
ENTITY
ENTITY
ENTITY ENTITY
ENTITY
mysqli::select_db example
ENTITY
<?php
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$mysqli = new mysqli("localhost", "my_user", "my_password", "test");
/* get the name of the current default database */
$result = $mysqli->query("SELECT DATABASE()");
$row = $result->fetch_row();
printf("Default database is %s.\n", $row[0]);
/* change default database to "world" */
$mysqli->select_db("world");
/* get the name of the current default database */
$result = $mysqli->query("SELECT DATABASE()");
$row = $result->fetch_row();
printf("Default database is %s.\n", $row[0]);
ENTITY
<?php
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$link = mysqli_connect("localhost", "my_user", "my_password", "test");
/* get the name of the current default database */
$result = mysqli_query($link, "SELECT DATABASE()");
$row = mysqli_fetch_row($result);
printf("Default database is %s.\n", $row[0]);
/* change default database to "world" */
mysqli_select_db($link, "world");
/* get the name of the current default database */
$result = mysqli_query($link, "SELECT DATABASE()");
$row = mysqli_fetch_row($result);
printf("Default database is %s.\n", $row[0]);
ENTITY
Default database is test.
Default database is world.
ENTITY
mysqli_connect, mysqli_real_connect
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