test.php

<?php

class LinkCore {
    protected function getBaseLink($args) {
        echo '<br>LinkCore -> '.$args;
    }
}

class Link extends LinkCore {
    public function getBaseLink($args) {
        echo '<br>Link -> '.$args;
        parent::getBaseLink($args);
    }
}


$link = new Link();
$link->getBaseLink("hello world");