PHP mysqli rollback() Function
Example - Object Oriented style
Turn off auto-committing, make some queries, commit the queries, then roll back the current transaction:
<?php
$mysqli = new mysqli("localhost","my_user","my_password","my_db");
if ($mysqli -> connect_errno) {
echo "Failed to connect to MySQL: " . $mysqli -> connect_error;
exit();
}
// Turn autocommit off
$mysqli -> autocommit(FALSE);
// Insert some values
$mysqli -> query("INSERT INTO Persons (FirstName,LastName,Age)
VALUES ('Peter','Griffin',35)");
$mysqli -> query("INSERT INTO Persons (FirstName,LastName,Age)
VALUES ('Glenn','Quagmire',33)");
// Commit transaction
if (!$mysqli -> commit()) {
echo "Commit
transaction failed";
exit();
}
// Rollback transaction
$mysqli -> rollback();
$mysqli -> close();
?>
Look at example of procedural style at the bottom.
Definition and Usage
The rollback() / mysqli_rollback() function rolls back the current transaction for the specified database connection.
Tip: Also look at the commit() function, which commits the current transaction, and the autocommit() function, which turns on or off auto-committing database modifications.
Syntax
Object oriented style:
$mysqli ->
rollback(flags, name)
Procedural style:
mysqli_rollback(connection, flags, name)
Parameter Values
| Parameter | Description |
|---|---|
| connection | Required. Specifies the MySQL connection to use |
| flags | Optional. A constant:
|
| name | Optional. ROLLBACK/*name*/ is executed if this parameter is specified |
Technical Details
| Return Value: | TRUE on success. FALSE on failure |
|---|---|
| PHP Version: | 5+ |
| PHP Changelog: | PHP 5.5: Added the flags and name parameters |
Example - Procedural style
Turn off auto-committing, make some queries, commit the queries, then roll back the current transaction:
<?php
$con=mysqli_connect("localhost","my_user","my_password","my_db");
if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL: " . mysqli_connect_error();
exit;
}
// Turn autocommit off
mysqli_autocommit($con,FALSE);
// Insert some values
mysqli_query($con,"INSERT INTO Persons (FirstName,LastName,Age)
VALUES ('Peter','Griffin',35)");
mysqli_query($con,"INSERT INTO Persons (FirstName,LastName,Age)
VALUES ('Glenn','Quagmire',33)");
// Commit transaction
if (!$mysqli_commit($con)) {
echo
"Commit transaction failed";
exit();
}
// Rollback transaction
mysqli_rollback($con);
// Close connection
mysqli_close($con);
?>
❮ PHP mysqli Reference
