mysqli::change_user

mysqli_change_user

(PHP 5)

mysqli::change_user -- mysqli_change_userChanges the user of the specified database connection

Descrierea

Stil obiect-orientat

bool mysqli::change_user ( string $user , string $password , string $database )

Stil procedural

bool mysqli_change_user ( mysqli $link , string $user , string $password , string $database )

Changes the user of the specified database connection and sets the current database.

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.

Parametri

link

Numai stilul procedural: Un identificator al legăturii întors de mysqli_connect() sau mysqli_init()

user

The MySQL user name.

password

The MySQL password.

database

The database to change to.

If desired, the NULL value may be passed resulting in only changing the user and not selecting a database. To select a database in this case use the mysqli_select_db() function.

Valorile întoarse

Întoarce valoarea TRUE în cazul succesului sau FALSE în cazul eșecului.

Note

Notă:

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.

Exemple

Example #1 mysqli::change_user() example

Stil obiect-orientat

<?php

/* connect database test */
$mysqli = new mysqli("localhost""my_user""my_password""test");

/* check connection */
if (mysqli_connect_errno()) {
    
printf("Connect failed: %s\n"mysqli_connect_error());
    exit();
}

/* Set Variable a */
$mysqli->query("SET @a:=1");

/* reset all and select a new database */
$mysqli->change_user("my_user""my_password""world");

if (
$result $mysqli->query("SELECT DATABASE()")) {
    
$row $result->fetch_row();
    
printf("Default database: %s\n"$row[0]);
    
$result->close();
}

if (
$result $mysqli->query("SELECT @a")) {
    
$row $result->fetch_row();
    if (
$row[0] === NULL) {
        
printf("Value of variable a is NULL\n");
    }
    
$result->close();
}

/* close connection */
$mysqli->close();
?>

Stil procedural

<?php
/* connect database test */
$link mysqli_connect("localhost""my_user""my_password""test");

/* check connection */
if (!$link) {
    
printf("Connect failed: %s\n"mysqli_connect_error());
    exit();
}

/* Set Variable a */
mysqli_query($link"SET @a:=1");

/* reset all and select a new database */
mysqli_change_user($link"my_user""my_password""world");

if (
$result mysqli_query($link"SELECT DATABASE()")) {
    
$row mysqli_fetch_row($result);
    
printf("Default database: %s\n"$row[0]);
    
mysqli_free_result($result);
}

if (
$result mysqli_query($link"SELECT @a")) {
    
$row mysqli_fetch_row($result);
    if (
$row[0] === NULL) {
        
printf("Value of variable a is NULL\n");
    }
    
mysqli_free_result($result);
}

/* close connection */
mysqli_close($link);
?>

Exemplele de mai sus vor afișa:

Default database: world
Value of variable a is NULL

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