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    mysqli::commit

    mysqli_commit

    (PHP 5, PHP 7)

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

    설명

    객체 기반 형식

    bool mysqli::commit ([ int $flags [, string $name ]] )

    절차식 형식

    bool mysqli_commit ( mysqli $link [, int $flags [, string $name ]] )

    Commits the current transaction for the database connection.

    인수

    link

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

    flags

    A bitmask of MYSQLI_TRANS_COR_* constants.

    name

    If provided then COMMIT/*name*/ is executed.

    반환값

    성공 시 TRUE를, 실패 시 FALSE를 반환합니다.

    변경점

    버전 설명
    5.5.0 Added flags and name parameters.

    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 */
    if (!$mysqli->commit()) {
        print(    "Transaction commit failed\n");
        exit();
    }

    /* 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 */
    if (!mysqli_commit($link)) {
        print(    "Transaction commit failed\n");
        exit();
    }

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

    참고

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    User Contributed Notes 6 notes

    up
    23
    snchzantonio at gmail dot com
    11 years ago
    I never recomend to use the ? with only one value variant like: $var = expression ? $var  : other_value or $var = expression ? null  : other_value ,and php suport Exception catchin so,use it :)

    here my opinion abut lorenzo's post:

      <?php

    //variants combined

    $mysqli->autocommit(FALSE);

    try{

          $mysqli->query("INSERT INTO myCity (id) VALUES (100)") or throw new Exception('error!');

    // or we can use

          if( !$mysqli->query("INSERT INTO myCity (id) VALUES (200)"){
        throw new     Exception('error!');
      }

    }catch(     Exception $e ){
          $mysqli->rollback();
    }
    $mysqli->commit();

    ?>
    up
    23
    mvanlamz
    15 years ago
    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.
    up
    17
    Lorenzo - webmaster AT 4tour DOT it
    15 years ago
    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!
    up
    1
    NoMan2000
    9 years ago
    This is to clarify the Flags parameters and what they mean:

    MYSQLI_TRANS_COR_AND_CHAIN:

    Appends "AND CHAIN" to mysqli_commit or mysqli_rollback.

    MYSQLI_TRANS_COR_AND_NO_CHAIN:

    Appends "AND NO CHAIN" to mysqli_commit or mysqli_rollback.

    MYSQLI_TRANS_COR_RELEASE:

    Appends "RELEASE" to mysqli_commit or mysqli_rollback.

    MYSQLI_TRANS_COR_NO_RELEASE:

    Appends "NO RELEASE" to mysqli_commit or mysqli_rollback.

    To clarify those options:

    The AND CHAIN clause causes a new transaction to begin as soon as the current one ends, and the new transaction has the same isolation level as the just-terminated transaction.

    The RELEASE clause causes the server to disconnect the current client session after terminating the current transaction.
    up
    0
    zattechnology at gmail dot com
    5 years ago
    When you have alot of transactions to make, say you are applying inserting items to the database from a loop, it will be better to use the mysqli_commit for this kind of process as it will only hit the database once.

    //Wrong way
    Example 1:

    $con = mysqli_connect("host", "username", "password", "database") or die("Could not establish connection to database");

    $users = ["chris", "james", "peter", "mark", "joe", "alice", "bob"]

    for($i=0; $i<count($users); $i++){
           $user= $users[$i];
           $query = mysqli_query($con, "INSERT INTO users (username) VALUES ('$user') ");
    }

    //Correct Way
    Example 2

    $con = mysqli_connect("host", "username", "password", "database") or die("Could not establish connection to database");

    $users = ["chris", "james", "peter", "mark", "joe", "alice", "bob"]

    //Turn off autocommit
    mysqli_autocommit($con, FALSE)

    //Make some transactions
    for($i=0; $i<count($users); $i++){
         $user= $users[$i];
         $query = mysqli_query($con, "INSERT INTO users (username) VALUES ('$user') ");
    }

    //Make a one-time hit to the database
    mysqli_commit($con)

    As with the Example 1, since we had 7 items in the list, this means that their will be a 7 times hit to our database which can really affect performance. But with the Example 2, since we already turned off autocommit this means that the transactions will be queued ontill will explicitly call mysqli_commit($con)
    up
    -15
    Bob Johnson
    15 years ago
    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
                        }
    ?>
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