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
Returns the current in-transaction status of the server.
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.
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 |
现在 connection 参数接受 PgSql\Connection
实例，之前接受 资源(resource)。
|
范例
示例 #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';
}
?>
add a note
User Contributed Notes 2 notes
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
?>
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.
备份地址：http://www.lvesu.com/blog/php/function.pg-transaction-status.php