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# maxdb_change_user

(PECL)

maxdb_change_user

(no version information, might be only in CVS)

maxdb->change_user -- Changes the user of the specified database connection

## Description

Procedural style:

bool maxdb_change_user ( resource link, string user, string password, string database )

Object oriented style (method):

class maxdb {
bool change_user ( string user, string password, string database )
}

maxdb_change_user() is used to change the user of the specified database connection as given by the link parameter and to set the current database to that specified by the database parameter.

In order to successfully change users a valid username and password parameters must be provided and that user must have sufficient permissions to access the desired database. If for any reason authorization fails, the current user authentication will remain.

> 注: Using this command will always cause the current database connection to behave as if was a completely new database connection, regardless of if the operation was completed successfully. This reset includes performing a rollback on any active transactions, closing all temporary tables, and unlocking all locked tables.

## Return Values

如果成功则返回 `TRUE`，失败则返回 `FALSE`。

## See also:

maxdb_connect() maxdb_select_db()

## Example

例子 1. Object oriented style

`<?php
/* connect database test */
$maxdb = new maxdb("localhost", "MONA", "RED", "DEMODB");
/* check connection */
if (maxdb_connect_errno()) {
printf("Connect failed: %s\n", maxdb_connect_error());
exit();
}
if ($result = $maxdb->query("SELECT * FROM dual")) {
$row = $result->fetch_row();
printf("Result: %s\n", $row[0]);
$result->free();
}
/* reset all and select a new database */
if (!$maxdb->change_user("DBADMIN", "SECRET", "DEMODB")) {
printf("Database not running\n");
} else {
printf("Database running\n");
}
/* close connection */
$maxdb->close();
?>`

例子 2. Procedural style

`<?php
$link = maxdb_connect("localhost", "MONA", "RED", "DEMODB");
/* check connection */
if (!$link) {
printf("Connect failed: %s\n", maxdb_connect_error());
exit();
}
if ($result = maxdb_query($link, "SELECT * FROM dual")) {
$row = maxdb_fetch_row($result);
printf("Result: %s\n", $row[0]);
maxdb_free_result($result);
}
/* reset all and select a new database */
if (!maxdb_change_user($link, "DBADMIN", "SECRET", "DEMODB")) {
printf("Database not running\n");
} else {
printf("Database running\n");
}
/* close connection */
maxdb_close($link);
?>`

The above examples would produce the following output:

    Result: a
    Database running

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