WordPress at a glance
function is not described

POP3::update_timer() public WP 1.0

{} It's a method of the class: POP3{}

No Hooks.

Return

Null. Nothing.

Usage

$POP3 = new POP3();
$POP3->update_timer ();

Code of POP3::update_timer() WP 5.5.2

<?php
function update_timer () {
    set_time_limit($this->TIMEOUT);
    return true;
}