<?php

$variavel = "-4.08768, -63.141322 23/04/2017 22:00:00";
$variavel=str_replace(", ",",",$variavel);
$partes = explode(' ',$variavel);
 
$coordenadas=$partes[0];
$data=$partes[1];
$hora=$partes[2];
$coordenadas=str_replace(",", ",",$coordenadas);
echo $coordenadas ."\n";
echo $data ."\n";
echo  $hora ."\n";