pg_get_notify

(PHP 4 >= 4.3.0, PHP 5)

pg_get_notify — Gets SQL NOTIFY message

Описание

array pg_get_notify ( resource $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.

Список параметров

connection: PostgreSQL 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.

Возвращаемые значения

An array containing the NOTIFY message name and backend PID. Otherwise if no NOTIFY is waiting, then FALSE is returned.

Примеры

Пример #1 PostgreSQL NOTIFY message


<?php 
$conn = pg_pconnect("dbname=publisher");
if (!$conn) {
  echo "An error occured.\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);
}
?>

Смотрите также

pg_get_pid() - Gets the backend's process ID