MAXDB_SELECT_DB(3) 1 MAXDB_SELECT_DB(3)
maxdb_select_db - Selects the default database for database queries
SYNOPSIS
bool maxdb_select_db (resource $link, string $dbname)
DESCRIPTION
The maxdb_select_db(3) function selects the default database (specified by the $dbname parameter) to be used when performing queries
against the database connection represented by the $link parameter.
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 maxdb_connect(3).
RETURN VALUES
Returns TRUE on success or FALSE on failure.
EXAMPLES
Example #1
Object oriented style
<?php
$maxdb = new maxdb("localhost", "MONA", "RED", "DEMODB");
/* check connection */
if (maxdb_connect_errno()) {
printf("Connect failed: %s
", maxdb_connect_error());
exit();
}
/* return name of current default database */
if ($result = $maxdb->query("SELECT SERVERDB FROM USERS WHERE USERNAME='MONA'")) {
$row = $result->fetch_row();
printf("Default database is %s.
", $row[0]);
$result->close();
}
/* change db to non existing db */
$maxdb->select_db("XXXXXXXX");
/* return name of current default database */
if ($result = $maxdb->query("SELECT SERVERDB FROM USERS WHERE USERNAME='MONA'")) {
$row = $result->fetch_row();
printf("Default database is %s.
", $row[0]);
$result->close();
}
$maxdb->close();
?>
Example #2
Procedural style
<?php
$link = maxdb_connect("localhost", "MONA", "RED", "DEMODB");
/* check connection */
if (maxdb_connect_errno()) {
printf("Connect failed: %s
", maxdb_connect_error());
exit();
}
/* return name of current default database */
if ($result = maxdb_query($link, "SELECT SERVERDB FROM USERS WHERE USERNAME='MONA'")) {
$row = maxdb_fetch_row($result);
printf("Default database is %s.
", $row[0]);
maxdb_free_result($result);
}
/* change db to non existing db */
maxdb_select_db($link, "XXXXXXXX");
/* return name of current default database */
if ($result = maxdb_query($link, "SELECT SERVERDB FROM USERS WHERE USERNAME='MONA'")) {
$row = maxdb_fetch_row($result);
printf("Default database is %s.
", $row[0]);
maxdb_free_result($result);
}
maxdb_close($link);
?>
The above example will output something similar to:
Default database is <...>.
Warning: maxdb_select_db(): -10709 Connection failed (RTE:database not running) <...>
Warning: maxdb_query(): -10821 Session not connected [] <...>
Warning: maxdb_close(): -10821 Session not connected [] <...>
SEE ALSO
maxdb_connect(3), maxdb_real_connect(3).
PHP Documentation Group MAXDB_SELECT_DB(3)
