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
Description
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.
Note:
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().
Return Values
Returns TRUE on success or FALSE on failure.
Examples
Example 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();
?>
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Example 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);
?>
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The above example will output:
Default database is test.
Default database is world. |