PostgreSQL (PDO)
PHP Manual

PDO::pgsqlGetNotify

Get asynchronous notification

Description

public arrayfalse PDO::pgsqlGetNotify(int $result_type = PDO::FETCH_USE_DEFAULT, int $ms_timeout = 0)

Returns a result set representing a pending asynchronous notification.

Parameters

result_type

The format the result set should be returned as, represented as a PDO::FETCH_* constant.

ms_timeout

The length of time to wait for a response, in milliseconds.

Return Values

If one or more notifications is pending, returns a single row, with fields message and pid, otherwise returns false.