boucle php par date du mois

Question

Pourvu du code indiqué ci-dessous, les sorties sont (voir ci-dessous). Ma question est la suivante: après 2009/11/01, il s'agit des 2009/11/30 et 2009/12/30 au lieu du 2009/12/01. Du 2009/06/01 ~ 2009/11/01 il n'y a pas de problème.

sortie
2009/06/01
2009/07/01
2009/08/01
2009/09/01
2009/10/01
2009/11/01
2009/11/30
2009/12/30

mon code

<?php 

$startdate = "2009/06/01"; 
$enddate = "2009/12/31"; 

$start = strtotime($startdate); 
$end = strtotime($enddate); 

$currentdate = $start; 
while($currentdate < $end) 
{ 
    $cur_date = date('Y/m/d',$currentdate); 
    $month = date('m', $currentdate); 
    $year = date('Y', $currentdate); 
    $monthLength = daysOfMonth($month, $year); 
    $currentdate += $monthLength; 

    echo $cur_date . "<br />"; 
} 


function daysOfMonth($month, $year) 
{ 
    return (86400 * date("t", strtotime($year."-".$month."-01"))); 
} 

?> 

Answer 1

<?php 

$startdate = "2009/06/01"; 
$enddate = "2009/12/31"; 

$start = strtotime($startdate); 
$end = strtotime($enddate); 

$currentdate = $start; 
while($currentdate < $end) 
{ 
     $cur_date = date('Y/m/d', $currentdate); 

     $currentdate = strtotime('+1 month', $currentdate); 

     echo $cur_date . "<br />"; 
} 

?>