Time Based PHP Greetings

<?php

$b = time();

$hour = date("g",$b);
$m = date ("A", $b);

if ($m == "AM")
{
if ($hour == 12)
{
echo "Good Evening!";
}
elseif ($hour < 4)
{
echo "Good Evening!";
}
elseif ($hour > 3)
{
echo "Good Morning!";
}
}

elseif ($m == "PM")
{
if ($hour == 12)
{
echo "Good Afternoon!";
}
elseif ($hour < 7)
{
echo "Good Afternoon!";
}
elseif ($hour > 6)
{
echo "Good Evening!";
}
}

?>

• Getting the Current Time
• If it is AM
• If it is PM
• Full Code