<?php

echo getDistance(55.8078912, 37.4611445, 55.8086, 37.4641);

function getDistance(float $latitudeFrom, float $longitudeFrom, float $latitudeTo, float $longitudeTo): int
{
    $rad = M_PI / 180;
    $theta = $longitudeFrom - $longitudeTo;
    $dist = sin($latitudeFrom * $rad) * sin($latitudeTo * $rad) + cos($latitudeFrom * $rad) * cos($latitudeTo * $rad) * cos($theta * $rad);

    return acos($dist) / $rad * 60 * 1.853;
}