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   1 # void pq\Transaction::__construct(pq\Connection $conn[, bool $async = FALSE[, int $isolation = pq\Transaction::READ_COMMITTED[, bool $readonly = FALSE[, bool $deferrable = FALSE]]]])
   2
   3 Start a transaction.
   4 See pq\Connection::startTransaction().
   5
   6 ## Params:
   7
   8 * pq\Connection $conn
   9   The connection to start the transaction on.
  10 * Optional bool $async = FALSE
  11   Whether to start the transaction [asynchronously](pq/Connection/: Asynchronous Usage).
  12 * Optional int $isolation = pq\Transaction::READ_COMMITTED
  13   The transaction isolation level (defaults to pq\Connection::$defaultTransactionIsolation).
  14 * Optional bool $readonly = FALSE
  15   Whether the transaction is readonly (defaults to pq\Connection::$defaultTransactionReadonly).
  16 * Optional bool $deferrable = FALSE
  17   Whether the transaction is deferrable (defaults to pq\Connection::$defaultTransactionDeferrable).
  18
  19 ## Throws:
  20
  21 * pq\Exception\InvalidArgumentException
  22 * pq\Exception\BadMethodCallException
  23 * pq\Exception\RuntimeException
  24
  25
  26 ## Example:
  27
  28         <?php
  29
  30         $connection = new pq\Connection;
  31         $transaction = new pq\Transaction(
  32                 $connection, FALSE, pq\Transaction::REPEATABLE_READ);
  33
  34         ?>