mysqli::begin_transaction

mysqli_begin_transaction

(PHP 5 >= 5.5.0, PHP 7)

mysqli::begin_transaction -- mysqli_begin_transactionStarts a transaction

Descrição

Estilo orientado à objeto

public mysqli::begin_transaction ([ int $flags = 0 [, string $name ]] ) : bool

Estilo procedural:

mysqli_begin_transaction ( mysqli $link [, int $flags = 0 [, string $name ]] ) : bool

Begins a transaction. Requires the InnoDB engine (it is enabled by default). For additional details about how MySQL transactions work, see » http://dev.mysql.com/doc/mysql/en/commit.html.

Parâmetros

link

Somente no estilo procedural: Um recurso link retornado por mysqli_connect() ou mysqli_init()

flags

Valid flags are:

  • MYSQLI_TRANS_START_READ_ONLY: Start the transaction as "START TRANSACTION READ ONLY". Requires MySQL 5.6 and above.

  • MYSQLI_TRANS_START_READ_WRITE: Start the transaction as "START TRANSACTION READ WRITE". Requires MySQL 5.6 and above.

  • MYSQLI_TRANS_START_WITH_CONSISTENT_SNAPSHOT: Start the transaction as "START TRANSACTION WITH CONSISTENT SNAPSHOT".

name

Savepoint name for the transaction.

Valor Retornado

Retorna true em caso de sucesso ou false em caso de falha.

Notas

Nota:

This function does not work with non transactional table types (like MyISAM or ISAM).

Exemplos

Exemplo #1 mysqli::begin_transaction() example

Estilo orientado à objeto

<?php

/* Tell mysqli to throw an exception if an error occurs */
mysqli_report(MYSQLI_REPORT_ERROR MYSQLI_REPORT_STRICT);

$mysqli = new mysqli("localhost""my_user""my_password""world");

/* The table engine has to support transactions */
$mysqli->query("CREATE TABLE IF NOT EXISTS language (
    Code text NOT NULL,
    Speakers int(11) NOT NULL
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;"
);

/* Start transaction */
$mysqli->begin_transaction();

try {
    
/* Insert some values */
    
$mysqli->query("INSERT INTO language(Code, Speakers) VALUES ('DE', 42000123)");

    
/* Try to insert invalid values */
    
$language_code 'FR';
    
$native_speakers 'Unknown';
    
$stmt $mysqli->prepare('INSERT INTO language(Code, Speakers) VALUES (?,?)');
    
$stmt->bind_param('ss'$language_code$native_speakers);
    
$stmt->execute();

    
/* If code reaches this point without errors then commit the data in the database */
    
$mysqli->commit();
} catch (
mysqli_sql_exception $exception) {
    
$mysqli->rollback();

    throw 
$exception;
}

Estilo procedural

<?php

/* Tell mysqli to throw an exception if an error occurs */
mysqli_report(MYSQLI_REPORT_ERROR MYSQLI_REPORT_STRICT);

$mysqli mysqli_connect("localhost""my_user""my_password""world");

/* The table engine has to support transactions */
mysqli_query($mysqli"CREATE TABLE IF NOT EXISTS language (
    Code text NOT NULL,
    Speakers int(11) NOT NULL
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;"
);

/* Start transaction */
mysqli_begin_transaction($mysqli);

try {
    
/* Insert some values */
    
mysqli_query($mysqli"INSERT INTO language(Code, Speakers) VALUES ('DE', 42000123)");

    
/* Try to insert invalid values */
    
$language_code 'FR';
    
$native_speakers 'Unknown';
    
$stmt mysqli_prepare($mysqli'INSERT INTO language(Code, Speakers) VALUES (?,?)');
    
mysqli_stmt_bind_param($stmt'ss'$language_code$native_speakers);
    
mysqli_stmt_execute($stmt);

    
/* If code reaches this point without errors then commit the data in the database */
    
mysqli_commit($mysqli);
} catch (
mysqli_sql_exception $exception) {
    
mysqli_rollback($mysqli);

    throw 
$exception;
}

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