pg_get_notify
Gets SQL NOTIFY message
Description
arrayfalse pg_get_notify(PgSql\Connection $connection, int $mode = PGSQL_ASSOC)
Parameters
-
connection
-
An 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, the function will return an array with numerical indices,
using PGSQL_ASSOC it will return only associative indices
while PGSQL_BOTH will 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.
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);
}
?>