background.md

OS	Version	PHP Version	Actual	Expected
Mac OS X	10.7.3	5.3.8 with Suhosin (shipped w/ OSX)		YES
Mac OS X	10.7.4	5.3.10 with Suhosin (shipped w/ OSX)	YES
Ubuntu Server	10.04	5.3.2 with Suhosin (shipped w/ Ubuntu)		YES
Ubuntu Server	12.04	5.3.10 with Suhosin (shipped w/ Ubuntu)	YES
Mac OS X	10.7.3	5.3.6 - Self installed		YES
Mac OS X	10.7.3	5.3.7 - Self installed		YES
Mac OS X	10.7.3	5.3.8 - Self installed		YES
Mac OS X	10.7.3	5.3.9 - Self installed	YES
Mac OS X	10.7.3	5.3.10 - Self installed	YES
Mac OS X	10.7.3	5.3.11 - Self installed	YES
Mac OS X	10.7.3	5.3.12 - Self installed	YES
Mac OS X	10.7.4	5.3.6 - Self installed		YES
Mac OS X	10.7.4	5.3.7 - Self installed		YES
Mac OS X	10.7.4	5.3.8 - Self installed		YES
Mac OS X	10.7.4	5.3.9 - Self installed	YES
Mac OS X	10.7.4	5.3.10 - Self installed	YES
Mac OS X	10.7.4	5.3.11 - Self installed	YES
Mac OS X	10.7.4	5.3.12 - Self installed	YES

result-actual

Start date, @100: Thu, 01 Jan 1970 00:01:40 +0000 - 100
End date, @200: Thu, 01 Jan 1970 00:03:20 +0000 - 200

New Start Date, @100 + PT1S: Thu, 01 Jan 1970 01:01:41 +0000 - 3701

result-expected

Start date, @100: Thu, 01 Jan 1970 00:01:40 +0000 - 100
End date, @200: Thu, 01 Jan 1970 00:03:20 +0000 - 200

New Start Date, @100 + PT1S: Thu, 01 Jan 1970 01:01:41 +0000 - 101

run-against-versions.sh

#!/bin/bash

VS="5.3.6 5.3.7 5.3.8 5.3.9 5.3.10 5.3.11 5.3.12"

for version in $VS
do
    if [ ! -d "test-${version}" ]; then
        mkdir "test-${version}"
    fi

    cd "test-${version}"

    if [ ! -f "php.tar.gz" ]; then
        wget "http://www.php.net/get/php-${version?}.tar.gz/from/this/mirror"
        mv mirror php.tar.gz
    fi

    if [ ! -d "php-${version}" ]; then
        tar -zvvxf php.tar.gz
    fi

    cd "php-${version}"

    if [ ! -d `pwd`/build/php_build ]; then
        ./configure --prefix `pwd`/build/php_build
        make
        make install
    fi

    find ./build/php_build/bin/ -name php.\* -exec {} ../../testcase.php \; > ../../output.${version}
    cd ../../
done

sample.php

<?php

$startDate = new DateTime('@100');
$endDate   = new DateTime('@200');

$oneSecondInterval = new DateInterval('PT1S');

echo "Start date, @100: " . dt_format($startDate) . "\n";
echo "End date, @200: " . dt_format($endDate). "\n";
echo "\n";

$startDate->add($oneSecondInterval);
echo "New Start Date, @100 + PT1S: " . dt_format($startDate) . "\n";

function dt_format(DateTime $dt)
{
    return $dt->format('r') . " - " . $dt->getTimestamp();
}