- var_dump: documentation ( source)
<?php
$visibility = 'only_logged_in';
$loggedIn = true;
var_dump(($visibility == 'only_logged_in' && $loggedIn) || ($visibility == 'not_logged_in' && !$loggedIn));
$loggedIn = false;
var_dump(($visibility == 'only_logged_in' && $loggedIn) || ($visibility == 'not_logged_in' && !$loggedIn));
$visibility = 'not_logged_in';
$loggedIn = true;
var_dump(($visibility == 'only_logged_in' && $loggedIn) || ($visibility == 'not_logged_in' && !$loggedIn));
$loggedIn = false;
var_dump(($visibility == 'only_logged_in' && $loggedIn) || ($visibility == 'not_logged_in' && !$loggedIn));