mysqli::commit

mysqli_commit

(PHP 5)

mysqli::commit -- mysqli_commit — Commits the current transaction

설명

객체 기반 형식

bool mysqli::commit ( void )

절차식 형식

bool mysqli_commit ( mysqli $link )

Commits the current transaction for the database connection.

인수

link: 순차 형식 전용: mysqli_connect()나 mysqli_init()가 반환한 연결 식별자.

반환값

성공할 경우 TRUE를, 실패할 경우 FALSE를 반환합니다.

예제

Example #1 mysqli::commit() example

객체 기반 형식


<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");

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

$mysqli->query("CREATE TABLE Language LIKE CountryLanguage");

/* set autocommit to off */
$mysqli->autocommit(FALSE);

/* Insert some values */
$mysqli->query("INSERT INTO Language VALUES ('DEU', 'Bavarian', 'F', 11.2)");
$mysqli->query("INSERT INTO Language VALUES ('DEU', 'Swabian', 'F', 9.4)");

/* commit transaction */
$mysqli->commit();

/* drop table */
$mysqli->query("DROP TABLE Language");

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

절차식 형식


<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "test");

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

/* set autocommit to off */
mysqli_autocommit($link, FALSE);

mysqli_query($link, "CREATE TABLE Language LIKE CountryLanguage");

/* Insert some values */
mysqli_query($link, "INSERT INTO Language VALUES ('DEU', 'Bavarian', 'F', 11.2)");
mysqli_query($link, "INSERT INTO Language VALUES ('DEU', 'Swabian', 'F', 9.4)");

/* commit transaction */
mysqli_commit($link);

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

참고

mysqli_autocommit() - Turns on or off auto-commiting database modifications
mysqli_rollback() - Rolls back current transaction

mysqli::connect_errno

mysqli::close

[edit] Last updated: Sat, 07 Jan 2012

add a note User Contributed Notes mysqli::commit

Bob Johnson 10-Sep-2009 04:42


The compactness of Lorenzo's code is admirable.


However, it is a good idea to also check  $mysqli->affected_rows to make sure that the INSERT statement did not fail. 





<?php


$result_query = @mysqli_query($query, $connect);


                if (($result_query == false) &&


                   (mysqli_affected_rows($connect) == 0))


                 {


                    // verify the query executed completely and verify that it


                    // had impact on the table





                    $success = false;





                    // here also, the developer could choose to add a ROLLBACK


                    // statement


                }


?>

mvanlamz 31-Mar-2009 05:36


Please note that calling mysqli::commit() will NOT automatically set mysqli::autocommit() back to 'true'.



This means that any queries following mysqli::commit() will be rolled back when your script exits.

Lorenzo - webmaster AT 4tour DOT it 10-Feb-2009 08:12


This is an example to explain the powerful of the rollback and commit functions.

Let's suppose you want to be sure that all queries have to be executed without errors before writing data on the database.

Here's the code:



<?php

$all_query_ok=true; // our control variable



//we make 4 inserts, the last one generates an error

//if at least one query returns an error we change our control variable

$mysqli->query("INSERT INTO myCity (id) VALUES (100)") ? null : $all_query_ok=false;

$mysqli->query("INSERT INTO myCity (id) VALUES (200)") ? null : $all_query_ok=false;

$mysqli->query("INSERT INTO myCity (id) VALUES (300)") ? null : $all_query_ok=false;

$mysqli->query("INSERT INTO myCity (id) VALUES (100)") ? null : $all_query_ok=false; //duplicated PRIMARY KEY VALUE



//now let's test our control variable

$all_query_ok ? $mysqli->commit() : $mysqli->rollback();



$mysqli->close();

?>



hope to be helpful!

add a note