Ssad

<?php
date_default_timezone_set('UTC');
$currentDate = strtotime($_GET['currentDate']);
$messages = preg_split('/\n/', $_GET['messages'], -1, PREG_SPLIT_NO_EMPTY);
$arrayMessages = array();
$lastActive = '';
foreach ($messages as $message) {
    $splitMessage = preg_split('/\s+\/\s+/', $message, -1, PREG_SPLIT_NO_EMPTY);
    $arrayMessages[$splitMessage[0]] = strtotime($splitMessage[1]);

}
asort($arrayMessages, SORT_NUMERIC);
foreach ($arrayMessages as $key => $value) {
    echo '<div>' . htmlspecialchars(trim($key)) .'</div>' . "\n";
}
$mostRecent = end($arrayMessages);
$difference = $currentDate - $mostRecent;

if (gmdate('z', $mostRecent) == gmdate('z', $currentDate)) {
    if ($difference < 60) {
        $lastActive = 'a few moments ago';
        echo '<p>Last active: <time>' . htmlspecialchars($lastActive) . '</time></p>';
    }
    else if ($difference < pow( 60, 2 )) {
        $lastActive = floor(($difference / 60));
        echo '<p>Last active: <time>' . htmlspecialchars($lastActive) . ' minute(s) ago' . '</time></p>';
    }
    else if (gmdate('z', $mostRecent) == gmdate('z', $currentDate)) {
        $lastActive = floor($difference / pow( 60, 2 ));
        echo '<p>Last active: <time>' . htmlspecialchars($lastActive) . ' hour(s) ago' . '</time></p>';
    }
} else if (intval(gmdate('z', $mostRecent)) + 1 == intval(gmdate('z', $currentDate))) {
    $lastActive = 'yesterday';
    echo '<p>Last active: <time>' . htmlspecialchars($lastActive) . '</time></p>';
}
else {
    $lastActive = gmdate('d-m-Y', $mostRecent);
    echo '<p>Last active: <time>' . htmlspecialchars($lastActive) . '</time></p>';
}