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pg_get_notify
Manuál PHP
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pg_get_notify

(PHP 4 >= 4.3.0, PHP 5)

pg_get_notify -- Gets SQL NOTIFY message

Popis

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.

Seznam parametrů

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.

Návratové hodnoty

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

Příklady

Příklad 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);
}
?>

Viz také

pg_get_pid()

PředcházejícíDomůDalší
pg_free_resultNahoru