WordPress at a glance
function is not described

MaxMind\Db

Reader::close() public WC 1.0

Closes the MaxMind DB and returns resources to the system.

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

No Hooks.

Return

Null. Nothing.

Usage

$Reader = new Reader();
$Reader->close();

Code of Reader::close() WC 5.0.0

<?php
public function close()
{
    if (!\is_resource($this->fileHandle)) {
        throw new BadMethodCallException(
            'Attempt to close a closed MaxMind DB.'
        );
    }
    fclose($this->fileHandle);
}