PostgreSQL
PHP Manual

pg_get_notify

(PHP 4 >= 4.3.0, PHP 5)

pg_get_notify — Gets SQL NOTIFY message

Descripción

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.

Lista de parámetros

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.

Valores retornados

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

Ejemplos

Example#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);
}
?>

Ver también


PostgreSQL
PHP Manual