Maximum and Minimum integer from array excluding NULL or ZERO values

Question

I am using below php functions to get highest and lowest integer value from my array.

min($output[$k]) AND max($output[$k])

Problem: I

Answer 1

Use

max(array_filter($output[$k));

Answer 2

Use array_diff() to filter array:

<?php
header('Content-Type: text/plain');

$buffer   = array(null, 0, 1, 2, 3, 0, null, 1);
$filtered = array_diff($buffer, array(null, 0));

$max = max($filtered);
$min = min($filtered);

var_dump($max, $min);
?>

Shows:

int(3)
int(1)