- var_dump: documentation ( source)
- min: documentation ( source)
<?php
$limit = [null, null];
var_dump(min($limit));
$limit = [null];
var_dump(min($limit));
$limit = [5];
var_dump(min($limit));
$limit = [5, null];
var_dump(min($limit));
$limit = [null, 5];
var_dump(min($limit));