pg_transaction_status

(PHP 5 >= 5.1.0, PHP 7, PHP 8)

pg_transaction_status — Returns the current in-transaction status of the server

说明

pg_transaction_status ( PgSql\Connection $connection ) : int

Returns the current in-transaction status of the server.

Caution

pg_transaction_status() will give incorrect results when using a PostgreSQL 7.3 server that has the parameter autocommit set to off. The server-side autocommit feature has been deprecated and does not exist in later server versions.

参数

connection: An PgSql\Connection instance.

返回值

The status can be PGSQL_TRANSACTION_IDLE (currently idle), PGSQL_TRANSACTION_ACTIVE (a command is in progress), PGSQL_TRANSACTION_INTRANS (idle, in a valid transaction block), or PGSQL_TRANSACTION_INERROR (idle, in a failed transaction block). PGSQL_TRANSACTION_UNKNOWN is reported if the connection is bad. PGSQL_TRANSACTION_ACTIVE is reported only when a query has been sent to the server and not yet completed.

更新日志

版本	说明
8.1.0	The `connection` parameter expects an PgSql\Connection instance now; previously, a 资源(resource) was expected.

范例

Example #1 pg_transaction_status() example


<?php
  $dbconn = pg_connect("dbname=publisher") or die("Could not connect");
  $stat = pg_transaction_status($dbconn);
  if ($stat === PGSQL_TRANSACTION_UNKNOWN) {
      echo 'Connection is bad';
  } else if ($stat === PGSQL_TRANSACTION_IDLE) {
      echo 'Connection is currently idle';
  } else {
      echo 'Connection is in a transaction state';
  }    
?>

User Contributed Notes

r dot grellmann at agentmulder dot de 23-Oct-2021 02:17


After one of the asynchronous functions (pg_send_query(), pg_send_query_params()...) has been used, pg_transaction_status() will always report PGSQL_TRANSACTION_ACTIVE, no matter if a transaction was started or not.

Even after the first call (or all valid calls) to pg_get_result() the transaction status will stay PGSQL_TRANSACTION_ACTIVE, until either

- a synchronous function like pq_query() was used, or

- another call to pg_get_result() was made, which returns false.

Note: calling pg_free_result() does not change anything.



<?php

  $conn = pg_connect("dbname=publisher") or die("Could not connect");

  $status = pg_transaction_status($conn); // PGSQL_TRANSACTION_IDLE

  pg_send_query($conn, 'SELECT 1');

  $status = pg_transaction_status($conn); // PGSQL_TRANSACTION_ACTIVE

  $res = pg_get_result($conn);

  $status = pg_transaction_status($conn); // PGSQL_TRANSACTION_ACTIVE

  $res = pg_get_result($conn); // false

  $status = pg_transaction_status($conn); // PGSQL_TRANSACTION_IDLE

?>

btherl at yahoo dot com dot au 17-Jul-2006 07:27


This function is implemented in C, so there's no way to mimic it in SQL for older versions of PHP.  But you can mimic some of the functionality by using a wrapper which keeps track of when you begin and commit/rollback transactions.