mysqli::autocommitmysqli::change_user
mysqli_change_user
(PHP 5)
mysqli::change_user -- mysqli_change_user — Changes the user of the specified database connection
Açıklama
Nesne yönelimli kullanım
$user
, string $password
, string $database
)Yordamsal kullanım
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.
Değiştirgeler
-
bağlantı -
Sadece yordamsal tarz: mysqli_connect() veya mysqli_init() işlevinden dönen bir bağlantı tanıtıcısı.
-
user -
The MySQL user name.
-
password -
The MySQL password.
-
database -
The database to change to.
If desired, the
NULLvalue 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.
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.
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
Ayrıca Bakınız
- mysqli_connect() - Takma Adı: mysqli::__construct
- mysqli_select_db() - Selects the default database for database queries
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User Contributed Notes
mysqli::change_user