Aantal weken in een maand

<?php
$iWeeks = ceil(date("t") / 7);
echo $iWeeks;
?>

<?php
$iWeeks = ceil(date("t") / 7);
echo $iWeeks;
?>

<?
// 1 Feb 2005
$date_start    = mktime(0,0,0,2,01,2005);

// 28 Feb 2005
$date_end     = mktime(0,0,0,2,28,2005);

$week_diff    = date('W', $date_end) - date('W', $date_start);

echo $week_diff;
?>

<?
// 1 Feb 2005
$date_start    = mktime(0,0,0,2,01,2005);
 
// 28 Feb 2005
$date_end     = mktime(0,0,0,2,28,2005);
 
$week_diff    = date('W', $date_end) - date('W', $date_start);
 
echo $week_diff;
?>

<?php
$weeks = ceil(cal_days_in_month(CAL_GREGORIAN, 2, 2005) / 7);
echo $weeks;
?>

<?php
$weeks = ceil(cal_days_in_month(CAL_GREGORIAN, 2, 2005) / 7);
echo $weeks;
?>

Feburari 2005
ma di wo do vr za zo
   1  2  3  4  5  6
7  8  9  10 11 12 13
14 15 16 17 18 19 20
21 22 23 24 25 26 27
28

Feburari 2005
ma di wo do vr za zo
   1  2  3  4  5  6
7  8  9  10 11 12 13
14 15 16 17 18 19 20
21 22 23 24 25 26 27
28

<?
echo date('W', mktime(0,0,0,1,1,2005));
?>

<?
echo date('W', mktime(0,0,0,1,1,2005));
?>

<?
$year = 2005;
$month = 1;
$num = cal_days_in_month(CAL_GREGORIAN, $month, $year);
$date_start = mktime(0,0,0,$month,1,$year);
$date_end = mktime(0,0,0,$month,$num,$year);
$week_diff = strftime("%W", $date_end) - strftime("%W", $date_start) + 1;
echo $week_diff;
?>

<?
$year = 2005;
$month = 1;
$num = cal_days_in_month(CAL_GREGORIAN, $month, $year);
$date_start = mktime(0,0,0,$month,1,$year);
$date_end = mktime(0,0,0,$month,$num,$year);
$week_diff = strftime("%W", $date_end) - strftime("%W", $date_start) + 1;
echo $week_diff;
?>