#void pq\Transaction::__construct(pq\Connection $conn[, bool $async = FALSE[, int $isolation = pq\Transaction::READ_COMMITTED[, bool $readonly = FALSE[, bool $deferrable = FALSE]]]])

Start a transaction. See pq\Connection::startTransaction().

Params:#

• pq\Connection $conn#
  The connection to start the transaction on.
• Optional bool $async# = FALSE
  Whether to start the transaction asynchronously.
• Optional int $isolation# = pq\Transaction::READ_COMMITTED
  The transaction isolation level (defaults to pq\Connection::$defaultTransactionIsolation).
• Optional bool $readonly# = FALSE
  Whether the transaction is readonly (defaults to pq\Connection::$defaultTransactionReadonly).
• Optional bool $deferrable# = FALSE
  Whether the transaction is deferrable (defaults to pq\Connection::$defaultTransactionDeferrable).

Throws:#

• pq\Exception\InvalidArgumentException
• pq\Exception\BadMethodCallException
• pq\Exception\RuntimeException

Example:#

<?php

$connection = new pq\Connection;
$transaction = new pq\Transaction(
    $connection, FALSE, pq\Transaction::REPEATABLE_READ);

?>