Is minus (negative) zero equivalent to 0 in PHP?

In PHP, there is no real difference:

Float:

php > $negZ = -0.0;
php > $posZ = +0.0;
php > var_dump($negZ == $posZ, $negZ === $posZ);
bool(true)
bool(true)

Int:

php > $negZ = -0;
php > $posZ = +0;
php > var_dump($negZ == $posZ, $negZ === $posZ);
bool(true)
bool(true)

I just asked myself the same question and thought 0 === -0 is true:

true

How to reproduce:

<?php

$sum = 1.0000001;
$val = 1.00;

$a = round($val - $sum,2);
var_dump($a, $a === 0);

float(-0)
bool(false)

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