<?php

$date = "03/31/2015";

if (DateTime::createFromFormat('m/d/Y', $date) < new DateTime()) {
    echo "$date is in the past\n";
} else {
	echo "$date is not in the past\n";
}

$date = "06/30/2015";

if (DateTime::createFromFormat('m/d/Y', $date) < new DateTime()) {
    echo "$date is in the past\n";
} else {
	echo "$date is not in the past\n";
}