maxdb_change_user

maxdb::change_user

Changes the user of the specified database connection

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&style.procedural;

`bool` `maxdb_change_user` `resource` `link` `string` `user` `string` `password` `string` `database`

&style.oop;

`bool` `maxdb::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.

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.

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&return.success;

&reftitle.examples;

### &style.oop;

    <?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();
    ?>

### &style.procedural;

    <?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);
    ?>

&example.outputs.similar;

    Result: a
    Database running

&reftitle.seealso;

- `maxdb_connect`
- `maxdb_select_db`