PHP create and modify date

PHP create and modify date.php

<?php
//create and modifying dates month

//creating new current date
$date_from      =  date('Y-m-01');                                              //first day of the current month
$date_to        =  date('Y-m-t');                                              //last day of the current month using t, use d for 

//creating previous month date
$date_from_prev = date('Y-m-01', strtotime("first day of last month"));  
$date_to_prev   = date('Y-m-t', strtotime("last day of last month"));  

//creating next month date
$date_from_next = date('Y-m-01', strtotime("first day of next month"));  
$date_to_next   = date('Y-m-t', strtotime("last day of next month"));  

//easy acces to month info
$dateArray      = getdate(strtotime($date_to));
echo $dateArray['year'] . "<br />";                                             //year in 4 digit format
echo sprintf("%02d", $dateArray['mon']) . "<br />";                             //month number in 0N format
echo $dateArray['mon'] . "<br />";                                              //month number
echo $dateArray['month'] . "<br />";                                            //month name
echo $dateArray['mday'] . "<br />";                                             //number of days in monh

//current date
$month          = date("F", strtotime($date_from));                             //get the month name from date object

// *******************************************
// Modifying DateTime
// *******************************************
$date = new DateTime($datestring);                                              //create date from string

//get previous month
$date->modify('-1 month');                                                       //have some problems with months with 31 days??
$date->modify('last day of last month');                                        // this one is safe to use

//get next month
$date->modify('+1 month');                                                       //have some problems with months with 31 days??
$date->modify('last day of next month');                                        // this one is safe to use

// *******************************************
// Basic date paring and localization
// *******************************************
$dbdate = \DateTime::createFromFormat('Y-m-d H:i:s', "date string from db");
$format_date = $dbdate->format('d F Y');
setlocale(LC_TIME, "nl_NL"); //only necessary if the locale isn't already set
$format_date_localization = strftime("%d %B %Y", $dbdate->getTimestamp())

?>