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pg_get_notify
Gets SQL NOTIFY message
(PHP 4 >= 4.3.0, PHP 5)
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.
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_NUMandPGSQL_BOTH. UsingPGSQL_NUM, pg_get_notify() will return an array with numerical indices, usingPGSQL_ASSOCit will return only associative indices whilePGSQL_BOTH, the default, will return both numerical and associative indices.
Return Values
An array containing the NOTIFY message name and backend PID.
Otherwise if no NOTIFY is waiting, then FALSE is returned.
Examples
Example 1935. 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);
}
?>
| pg_get_pid() |