<?php

$texto = "SSC Napoli v Dnipro - Quinta-Feira 07/05/2015 16:05 Horas
          SSC Napoli v Dnipro - Quinta-Feira 08-06-2015 17:05 Horas
          SSC Napoli v Dnipro - Quinta-Feira 09.06.2015 18:05 Horas";

preg_match_all('~(\d{2})[-.\/](\d{2})[-.\/]+(\d{4})\s([\d:]+)~', $texto, $datas);

foreach($datas[0] as $data) echo "Data completa: {$data}\n";
foreach($datas[1] as $dia)  echo "Dia encontrado: {$dia}\n";
foreach($datas[2] as $mes)  echo "Dia encontrado: {$mes}\n";
foreach($datas[3] as $ano)  echo "Ano encontrado: {$ano}\n";
foreach($datas[4] as $horario) echo "Horário encontrado: {$horario}\n";