<?php
$start = strtotime('20016-02-05');
$end = strtotime('2016-04-05');
$start_m = new DateTime('20016-02-05');
$end_m = new DateTime('2016-04-05');
$start_m->modify('first day of this month');
$end_m->modify('first day of next month');
$interval = DateInterval::createFromDateString('1 month');
$period = new DatePeriod($start_m, $interval, $end_m);
print_r($date_range_m);
Warning: Undefined variable $date_range_m in /in/LSpe0 on line 13
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
Warning: Undefined variable $date_range_m in /in/LSpe0 on line 13