<?php
trait Lib
{
    protected function latmin($latlon, $distance = 5)
    {
        $latmin = ($latlon['lat'] - $distance / 69);
        return $latmin;
    }
    protected function latmax($latlon, $distance = 5)
    {
        $latmax = ($latlon['lat'] + $distance / 69);
        return $latmax;
    }
    protected function lonmin($latlon, $distance = 5)
    {
        $lonmin = ($latlon['lon'] - $distance / (69 / cos(deg2rad($latlon['lat']))));
        return $lonmin;
    }
    protected function lonmax($latlon, $distance = 5)
    {
        $lonmax = ($latlon['lon'] + $distance / (69 / cos(deg2rad($latlon['lat']))));
        return $lonmax;
    }
}