WordPress at a glance
function is not described

PHPMailer\PHPMailer

SMTP::getServerExtList() public WP 1.0

Get SMTP extensions available on the server.

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

No Hooks.

Return

Array|null. Nothing.

Usage

$SMTP = new SMTP();
$SMTP->getServerExtList();

Code of SMTP::getServerExtList() WP 5.7.2

<?php
public function getServerExtList()
{
    return $this->server_caps;
}