在php中将日期分组为月

Question

创建了下面的make time以显示两周一次的日期

<?php
  $date1 = "07/05/2013";
  $date2 = date('M j, Y', strtotime($date1 . " + 14 day"));
  $date3 = date('M j, Y', strtotime($date2 . " + 14 day"));
  $date4 = date('M j, Y', strtotime($date3 . " + 14 day"));
  $date5 = date('M j, Y', strtotime($date4 . " + 14 day"));
  $date6 = date('M j, Y', strtotime($date5 . " + 14 day"));
  $date7 = date('M j, Y', strtotime($date6 . " + 14 day"));
  $date8 = date('M j, Y', strtotime($date7 . " + 14 day"));
  $date9 = date('M j, Y', strtotime($date8 . " + 14 day"));
  $date10 = date('M j, Y', strtotime($date9 . " + 14 day"));
  $date11 = date('M j, Y', strtotime($date10 . " + 14 day"));
  $date12 = date('M j, Y', strtotime($date11 . " + 14 day"));
  $date13 = date('M j, Y', strtotime($date12 . " + 14 day"));
  $date14 = date('M j, Y', strtotime($date13 . " + 14 day"));
  $date15 = date('M j, Y', strtotime($date14 . " + 14 day"));
  $date16 = date('M j, Y', strtotime($date15 . " + 14 day"));
  $date17 = date('M j, Y', strtotime($date16 . " + 14 day"));
  $date18 = date('M j, Y', strtotime($date17 . " + 14 day"));
?>

我怎么才能让它按月分组？假设我想知道有多少日期在8月或12月。另外，如果我想在年底前得到多少个日期呢？我们将非常感谢您的帮助。

Answer 1

试试这个：

<?php
// initiate months
$month_arr = Array();
for ($i=1; $i<=12; $i++){
    // no. of dates
    $month_arr[$i] = 0;
}
$date_arr = Array();
$date_start = "07/05/2013";
$date_arr[] = date('M j, Y', strtotime($date_start));

for ($i=1; $i<=17; $i++){
    $date_temp = date('M j, Y', strtotime($date_arr[$i-1] . " + 14 day"));
    $month = date('n', strtotime($date_temp));

    $month_arr[$month] += 1;
    $date_arr[] = $date_temp;

  }

 foreach ($month_arr as $k => $v){
    echo "<BR>Month: " . $k . ", No. of dates: " . $v;
 }

// all dates
echo "<BR>All dates<BR>";
var_dump ($date_arr);
?>

您可以扩展此逻辑以按月对实际日期进行分组，而不是仅获取一个月中的日期计数。这就是解决方案：

<?php
// initiate months
$month_arr = Array(
            'January' => Array('num_dates'=>0, 'dates'=>Array()) , 
            'February' => Array('num_dates'=>0, 'dates'=>Array()), 
            'March' => Array('num_dates'=>0, 'dates'=>Array()), 
            'April' => Array('num_dates'=>0, 'dates'=>Array()), 
            'May' => Array('num_dates'=>0, 'dates'=>Array()), 
            'June' => Array('num_dates'=>0, 'dates'=>Array()), 
            'July' => Array('num_dates'=>0, 'dates'=>Array()), 
            'August' => Array('num_dates'=>0, 'dates'=>Array()), 
            'September' => Array('num_dates'=>0, 'dates'=>Array()), 
            'October' => Array('num_dates'=>0, 'dates'=>Array()), 
            'November' => Array('num_dates'=>0, 'dates'=>Array()), 
            'December' => Array('num_dates'=>0, 'dates'=>Array())
        );
$date_arr = Array();

$date_start = "07/05/2013";
$date_arr[] = date('M j, Y', strtotime($date_start));

for ($i=1; $i<=17; $i++){
    $date_temp = date('M j, Y', strtotime($date_arr[$i-1] . " + 14 day"));
    $month = date('F', strtotime($date_temp));

    $month_arr[$month]['dates'][] = $date_temp;
    $month_arr[$month]['num_dates'] += 1;
    $date_arr[] = $date_temp;
}

foreach ($month_arr as $k => $v){
    if (!empty($v)){
        if ($v['num_dates'] != 0){
            echo "<BR><BR>Month: " . $k;
            echo "<BR>No. of dates: " . $v['num_dates'];
            foreach ($v['dates'] as $k1=>$v1){
                echo "<BR>" . $v1;
            }
        }
     }
}
?>

在这一点上，$month_arr应该具备了您需要的一切。

Answer 2

我不太清楚您所说的按月分组是什么意思，但这将使用一个数组来声明所有日期，并且您可以更改$limit变量以增加或减少日期的数量。change $dates to and original date $left是数组中还剩多少天(它在命中第一天后触发，可以更改为在最后一天触发)，$amount是8月份的日期数量

<?php
$limit = 17;
$dates = array("07-05-2013");
for ($i=1; $i<=$limit; $i++){
    $dates[$i]=date('d-m-Y', strtotime($dates[$i-1] . "+ 14 days"));
}
foreach (array_keys($dates) as $key){ 
    $value = date('m', strtotime($dates[$key])); 
    if ($value == "08"){
        $amount = $amount + 1;  
    }
    if ($amount == 1){
        $left = $limit-$key;
    }
}
print_r ($dates);
echo "<br>";
echo $amount . "<br>" . $left;
?>

Answer 3

只需添加一条if语句，并在整个12个月内递增...如果月份相同

 $n=1;
 $month=array();//dumpyour dates in  an array
 $date=array()

 while($k<30){
 if  (date('n', strtotime($date[$k]))==date('n', strtotime($date[$k-1])){
 echo $date[$k++];
 $m = date('n', strtotime($date[$k]));
 $month[$m]=++$n;
 }
 else{
 .....

 }
 }