mysqli::change_user

mysqli_change_user

(PHP 5, PHP 7, PHP 8)

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

Açıklama

Nesne yönelimli kullanım

public mysqli::change_user(string $username, string $password, ?string $database): bool

Yordamsal kullanım

mysqli_change_user(
    mysqli $mysql,
    string $username,
    string $password,
    ?string $database
): bool

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.

Bağımsız Değişkenler

bağlantı

Sadece yordamsal tarz: mysqli_connect() veya mysqli_init() işlevinden dönen bir mysqli nesnesi.

username

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.

Dönen Değerler

Başarı durumunda true, başarısızlık durumunda false döner.

Hatalar/İstisnalar

If mysqli error reporting is enabled (MYSQLI_REPORT_ERROR) and the requested operation fails, a warning is generated. If, in addition, the mode is set to MYSQLI_REPORT_STRICT, a mysqli_sql_exception is thrown instead.

Örnekler

Örnek 1 mysqli::change_user() example

Nesne yönelimli kullanım

<?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();
?>

Yordamsal kullanım

<?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);
?>

Yukarıdaki örneklerin çıktısı:

Default database: world
Value of variable a is NULL

Notlar

Bilginize:

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.

Ayrıca Bakınız

add a note

User Contributed Notes

There are no user contributed notes for this page.
To Top