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mysqli::commit

mysqli_commit

(PHP 5)

mysqli::commit -- mysqli_commit — 提交一个事务

说明

面向对象风格

bool mysqli::commit ( void )

过程化风格

bool mysqli_commit ( mysqli $link )

提交数据库连接的当前事务

参数

link

仅以过程化样式：由 mysqli_connect() 或 mysqli_init() 返回的链接标识。

返回值

成功时返回 TRUE， 或者在失败时返回 FALSE.

范例

Example #1 mysqli::commit() example

面向对象风格

<?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();
?>

过程化风格

<?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);
?>

参见

MySQLi
在线手册：中文 英文
PHP手册
PHP手册 - N: 提交一个事务

用户评论:

Bob Johnson (10-Sep-2009 06:42)

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 07:36)

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 (11-Feb-2009 11:12)

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!