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pg_get_notify
Podręcznik PHP
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pg_get_notify

(PHP 4 >= 4.3.0, PHP 5)

pg_get_notify -- Gets SQL NOTIFY message

Opis

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.

Parametry

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.

Zwracane wartości

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

Przykłady

Przykład 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);
}
?>

Patrz także

pg_get_pid()

PoprzedniSpis treściNastępny
pg_free_resultPoczątek rozdziału