pg_get_notify
(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)
pg_get_notify — Gets SQL NOTIFY message
Description
pg_get_notify() gets notifications generated by a
NOTIFY SQL command. To receive notifications,
the LISTEN SQL command must be
issued.
Parameters
-
connection -
An PgSql\Connection instance.
-
mode -
An optional parameter that controls how the returned array is indexed.
modeis a constant and can take the following values:PGSQL_ASSOC,PGSQL_NUMandPGSQL_BOTH. UsingPGSQL_NUM, the function will return an array with numerical indices, usingPGSQL_ASSOCit will return only associative indices whilePGSQL_BOTHwill return both numerical and associative indices.
Return Values
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.
Changelog
| Version | Description |
|---|---|
| 8.1.0 |
The connection parameter expects an PgSql\Connection
instance now; previously, a resource was expected.
|
Examples
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);
}
?>
