- substr: documentation ( source)
<?php
//echo date('d-M-y');
//echo date('d-m-y H:i:s A' , strtotime( '29-APR-13 09.28.12.505032 pm'));
$date = '29-APR-13 09.28.12.505032 PM';
$new_date = substr($date,0,18).substr($date, 25,28);
//$newDate = str_replace(substr($date, 18, 25), "", $date);
echo $new_date;