错误日期PHP

Question

i have these code,

  $end = strtotime ('last day of previous month') ;
  $start = strtotime ("-1 year +1 day", $end) ;

    $new ['first'] =  date ('Y-m-d',$start) ;
    $new ['last'] = date ('Y-m-d',$end) ;

    $interval = DateInterval::createFromDateString ('1 month') ;
    $period = new DatePeriod($start, $interval, $end) ;

    foreach ($periods as $period) {
      print_r($period -> date_format('Y-m')) ; echo "<br>";
    }

but, I have returned by this message:

An uncaught Exception was encountered

Type: Exception

Message: DatePeriod::__construct(): This constructor accepts either (DateTimeInterface, DateInterval, int) OR (DateTimeInterface, DateInterval, DateTime) OR (string) as arguments.

anyone can help me?

Answer 1

You have syntax error and object initialization error. Here is the correction:

$end = strtotime ('last day of previous month') ;
$start = strtotime ("-1 year +1 day", $end) ;
$new['first'] =  date ('Y-m-d', $start) ;
$new['last'] = date ('Y-m-d', $end) ;

$interval = DateInterval::createFromDateString ('1 months') ;

$periods = new DatePeriod(new DateTime($new['first']), $interval, new DateTime($new['last'])) ;

foreach ($periods as $period) {
    print_r($period->format('Y-m')) ; echo "<br>";
} 

Problem 1: DatePeriod constructor accepts DateTime object. Please check manual http://php.net/manual/en/class.dateperiod.php

Problem 2: you need $periodsvariable as you used in foreach