(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)
pg_get_notify — Gets SQL NOTIFY message
pg_get_notify() gets notifications generated by a
NOTIFY SQL command. To receive notifications,
the LISTEN SQL command must be
issued.
connectionAn PgSql\Connection instance.
mode
An optional parameter that controls
how the returned array is indexed.
mode is a constant and can take the
following values: PGSQL_ASSOC,
PGSQL_NUM and PGSQL_BOTH.
Using PGSQL_NUM, pg_get_notify()
will return an array with numerical indices, using
PGSQL_ASSOC it will return only associative indices
while PGSQL_BOTH, the default, will return both
numerical and associative indices.
An array containing the NOTIFY message name and backend PID.
If supported by the server, the array also contains the server version and the payload.
Otherwise if no NOTIFY is waiting, then false is returned.
| Version | Description |
|---|---|
| 8.1.0 |
The connection parameter expects an PgSql\Connection
instance now; previously, a resource was expected.
|
Example #1 PostgreSQL NOTIFY message
<?php
$conn = pg_pconnect("dbname=publisher");
if (!$conn) {
echo "An error occurred.\n";
exit;
}
// Listen 'author_updated' message from other processes
pg_query($conn, 'LISTEN author_updated;');
$notify = pg_get_notify($conn);
if (!$notify) {
echo "No messages\n";
} else {
print_r($notify);
}
?>