Hola,
a ver si te sirve con esto:
Código PHP:
<?php
$fecha = date("Y-m-d");
$timestamp = strtotime($fecha.' 00:00:00')-900;
$timestamp_limite = strtotime($fecha.' 23:59:59');
echo "<table>";
do
{
$timestamp += 900;
$hora = date("d-m-Y H:i:s", $timestamp);
echo "<tr><td>".$hora."</td></tr>";
} while ($timestamp < $timestamp_limite);
echo "</table>";
Saludos!
Synkronice