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mysqli::commit

mysqli_commit

(PHP 5)

mysqli::commit -- mysqli_commitSalva a transação atual

Descrição

Estilo orientado a objeto (metodo)

bool mysqli::commit ( void )

Estilo de procedimento:

bool mysqli_commit ( mysqli $link )

Grava a transação atual para a conexão com o banco de dados especificada pelo parâmetro link.

Parâmetros

link

Procedural style only: A link identifier returned by mysqli_connect() or mysqli_init()

Valor Retornado

Retorna TRUE em caso de sucesso ou FALSE em caso de falha.

Exemplos

Exemplo #1 Estilo orientado a objeto

<?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 Type=InnoDB");

/* 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();
?>

Exemplo #2 Estilo de procedimento

<?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 Type=InnoDB");

/* 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);
?>

Veja Também

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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
1 year 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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