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mysqli::commit

mysqli_commit

(PHP 5)

mysqli::commit -- mysqli_commitCommits the current transaction

Descrizione

Stile orientato agli oggetti

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

Stile procedurale

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

Commits the current transaction for the database connection.

Elenco dei parametri

link

Solo nello stile procedurale: un identificatore restituito da mysqli_connect() o mysqli_init()

flags

A bitmask of MYSQLI_TRANS_COR_* constants.

name

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

Valori restituiti

Restituisce TRUE in caso di successo, FALSE in caso di fallimento.

Log delle modifiche

Versione Descrizione
5.5.0 Added flags and name parameters.

Esempi

Example #1 mysqli::commit() example

Stile orientato agli oggetti

<?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();
?>

Stile procedurale

<?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($linkFALSE);

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);
?>

Vedere anche:

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User Contributed Notes 4 notes

up
10
Lorenzo - webmaster AT 4tour DOT it
5 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
6
snchzantonio at gmail dot com
11 months 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
3
mvanlamz
5 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
-11
Bob Johnson
4 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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