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pg_get_notify

Contents

(PHP 4 >= 4.3.0, PHP 5, PHP 7)

pg_get_notify — Gets SQL NOTIFY message

Description

pg_get_notify ( resource $connection [, int $result_type ] ) : array

pg_get_notify() gets notifications generated by a NOTIFY SQL command. To receive notifications, the LISTEN SQL command must be issued.

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Parameters

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.

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Return Values

An array containing the NOTIFY message name and backend PID. As of PHP 5.4.0 and if supported by the server, the array also contains the server version and the payload. Otherwise if no NOTIFY is waiting, then FALSE is returned.

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Examples

Example #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);
}
?>

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Document created the 30/01/2003, last modified the 26/10/2018
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References

  1. View the html document Language of the document:fr Manuel PHP : http://php.net

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