php เพิ่มวัน - เดือน - ปี ในการแสดงผล

บวกวันเพิ่ม

1. $datedate = date ("Y-m-d", strtotime("+1 day", strtotime($date)));

บวกเดือนเพิ่ม

1. $datedate = date ("Y-m-d", strtotime("+1 month", strtotime($date)));

บวกปีเพิ่ม

1. $datedate = date ("Y-m-d", strtotime("+1 year", strtotime($date)));  

<?php

echo date('Y-m-d', strtotime('+1 month'))."";

echo date('Y-m-d',strtotime("now"))."
";

echo date('Y-m-d',strtotime("10 September 2000"))."
";

echo date('Y-m-d',strtotime("+1 day"))."
";

echo date('Y-m-d',strtotime("+1 week"))."
";

echo date('Y-m-d',strtotime("+1 week 2 days 4 hours 2 seconds"))."
";

echo date('Y-m-d',strtotime("next Thursday"))."
";

echo date('Y-m-d',strtotime("last Monday"))."
";

echo date("Y-m-d H:i:s", mktime(date("H"), date("i")+0, date("s")+0, date("m")+0 , date("d")+0, date("Y")+0))."
";

?>

<?php
echo date('Y-m-d',strtotime('+1 month'))."<br>";
echo date('Y-m-d',strtotime("now"))."<br>";
echo date('Y-m-d',strtotime("10 September 2000"))."<br>";
echo date('Y-m-d',strtotime("+1 day"))."<br>";
echo date('Y-m-d',strtotime("+1 week"))."<br>";
echo date('Y-m-d',strtotime("+1 week 2 days 4 hours 2 seconds"))."<br>";
echo date('Y-m-d',strtotime("next Thursday"))."<br>";
echo date('Y-m-d',strtotime("last Monday"))."<br>";
echo date("Y-m-d H:i:s", mktime(date("H"), date("i")+0, date("s")+0, date("m")+0  , date("d")+0, date("Y")+0))."<br>";
?>