(PHP 5, PHP 7, PHP 8)
mysqli::change_user -- mysqli_change_user — Changes the user of the specified database connection
Nesne yönelimli kullanım
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.
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.
Eğer mysqli hata bildirimi etkinse (MYSQLI_REPORT_ERROR
) ve istenen işlem başarısız olursa bir uyarı üretilir. Ek olarak, kip MYSQLI_REPORT_STRICT
ise bunun yerine mysqli_sql_exception istisnası oluşur.
Örnek 1 mysqli::change_user() example
Nesne yönelimli kullanım
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "test");
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
$mysqli->query("SET @a:=1");
$mysqli->change_user("my_user", "my_password", "world");
if ($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();
}
$mysqli->close();
?>
Yordamsal kullanım
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "test");
if (!$link) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
mysqli_query($link, "SET @a:=1");
mysqli_change_user($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);
}
mysqli_close($link);
?>
Yukarıdaki örneklerin çıktısı:
Default database: world Value of variable a is NULL
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.