WordPress at a glance
function is not described

PHPMailer\PHPMailer

PHPMailer::encodeQP() public WP 1.0

Encode a string in quoted-printable format. According to RFC2045 section 6.7.

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

No Hooks.

Return

String.

Usage

$PHPMailer = new PHPMailer();
$PHPMailer->encodeQP( $string );
$string(string) (required)
The text to encode

Code of PHPMailer::encodeQP() WP 5.7.2

<?php
public function encodeQP($string)
{
    return static::normalizeBreaks(quoted_printable_encode($string));
}