(PHP 4 >= 4.3.0, PHP 5)
pg_get_notify — Gets SQL NOTIFY message
$connection
[, int $result_type
] )pg_get_notify() gets notifications generated by a NOTIFY SQL command. To receive notifications, the LISTEN SQL command must be issued.
connectionPostgreSQL database connection resource.
result_type
An optional parameter that controls
how the returned array is indexed.
result_type 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.
Otherwise if no NOTIFY is waiting, then FALSE is returned.
Ejemplo #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);
}
?>