check time

<?php
$timeStart = "01:30:00";
$timeEnd = "06:00:00";
// Gio G+0
$timeNowFull =   $_SERVER['REQUEST_TIME'];
// Gio G+7
//$timeNowFull =   $_SERVER['REQUEST_TIME'] + 7*60*60;
$timeNow = gmdate("H:i:s", $timeNowFull);

$timestampStart = strtotime($timeStart);
$timestampEnd = strtotime($timeEnd);
$timestampNow = strtotime($timeNow);

if (($timestampNow>$timestampStart) && ($timestampNow<$timestampEnd)){
    echo "OK";
} else {
    echo "NOT OK";
}

// Xuat ra de check
echo "<br>timeStart = $timeStart";
echo "<br>timeEnd = $timeEnd";
echo "<br>timeNow = $timeNow";
?>