獲取其中的幾個星期開始從第一個星期一PHP

Question

計數四月，直到第一個星期一明年四月週數

我努力實現以下目標：

爲了報告的目的我們的週數從第一個星期一開始在四月的每個年。

我使用以下格式PHP創建日曆：

MTWTFSS

在那一個月，我想顯示的週數，從每行的結尾處1，其中的第一個星期一四月將會是第一週一直到四月（明年）的下一個第一個星期一，從那裏再次開始。

我很努力的邏輯 - 任何人都可以提出解決方案嗎？

感謝

編輯看到我下面的代碼，基本上就是我想要做的是，而不必從1月1週數，有它的第一個星期一4月：

<?php 
$monthNames = Array("January", "February", "March", "April", "May",  "June", "July", 
"August", "September", "October", "November", "December"); 
?> 

<?php 
if (!isset($_REQUEST["month"])) $_REQUEST["month"] = date("n"); 
if (!isset($_REQUEST["year"])) $_REQUEST["year"] = date("Y"); 
?> 

<?php 
$cMonth = $_REQUEST["month"]; 
$cYear = $_REQUEST["year"]; 

$prev_year = $cYear; 
$next_year = $cYear; 
$prev_month = $cMonth-1; 
$next_month = $cMonth+1; 

if ($prev_month == 0) { 
    $prev_month = 12; 
    $prev_year = $cYear - 1; 
} 
if ($next_month == 13) { 
    $next_month = 1; 
    $next_year = $cYear + 1; 
} 
?> 

<table width="250"> 
<tr align="center"> 
<td bgcolor="#999999" style="color:#FFFFFF"> 
<table width="100%" border="0" cellspacing="0" cellpadding="0"> 
<tr> 
<td width="50%" align="left"> <a href="<?php echo $_SERVER["PHP_SELF"] . "?month=". $prev_month . "&year=" . $prev_year; ?>" style="color:#FFFFFF">Previous</a></td> 
<td width="50%" align="right"><a href="<?php echo $_SERVER["PHP_SELF"] . "?month=". $next_month . "&year=" . $next_year; ?>" style="color:#FFFFFF">Next</a> </td> 
</tr> 
</table> 
</td> 
</tr> 
<tr> 
<td align="center"> 
<table width="100%" border="0" cellpadding="2" cellspacing="2"> 
<tr align="center"> 
<td colspan="8" bgcolor="#999999" style="color:#FFFFFF"><strong><?php echo $monthNames[$cMonth-1].' '.$cYear; ?></strong></td> 
</tr> 
<tr> 
<td align="center" bgcolor="#999999" style="color:#FFFFFF"><strong>M</strong></td> 
<td align="center" bgcolor="#999999" style="color:#FFFFFF"><strong>T</strong></td> 
<td align="center" bgcolor="#999999" style="color:#FFFFFF"><strong>W</strong></td> 
<td align="center" bgcolor="#999999" style="color:#FFFFFF"><strong>T</strong></td> 
<td align="center" bgcolor="#999999" style="color:#FFFFFF"><strong>F</strong></td> 
<td align="center" bgcolor="#999999" style="color:#FFFFFF"><strong>S</strong></td> 
<td align="center" bgcolor="#999999" style="color:#FFFFFF"><strong>S</strong></td> 
<td align="center" bgcolor="#999999" style="color:#FFFFFF"><strong>Week No</strong></td> 
</tr> 


<?php 
$timestamp = mktime(0,0,0,$cMonth,1,$cYear); 
$maxday = date("t",$timestamp); 
$thismonth = getdate ($timestamp); 
//$startday = $thismonth['wday']; 
$startday = $thismonth['wday']-1; 

$firstDateMonth = 0; 

function roundToNearestW($int, $i) { 
    return ceil($int/$i) * $i; 
} 

if ($startday == -1) 
{ 
    $startday = 6; 
} 
$complete_cells = roundToNearestW($maxday+$startday,7); 
for ($i=0; $i<($complete_cells); $i++) { 
    if(($i % 7) == 0) 
    { 
     echo "<tr> 
     "; 
    } 
    if($i < $startday || $i >= $maxday+$startday) 
    { 
     echo "<td></td> 
     "; 
    } 
    else 
    { 
     if(($i - $startday + 1) > $firstDateMonth) 
     { 
      $firstDateMonth = ($i - $startday + 1); 
     } 
     echo "<td align='center' valign='middle' height='20px'>". ($i - $startday + 1) . "</td> 
     "; 
    } 
    if(($i % 7) == 6) 
    { 
     $weekDate = $cYear."-".$cMonth."-".$firstDateMonth; 
     $Caldate = new DateTime($weekDate); 
     $week = $Caldate->format("W"); 
     echo "<td align='center' valign='middle' height='20px'>WK ".$week."</td> 
     "; 
    } 
    if(($i % 7) == 6) 
    { 
     echo "</tr>"; 
     //firstDateMonth = 0; 
    } 

} 
?> 



</table> 
</td> 
</tr> 
</table> 

部分上面的日曆（微調自己的代碼）的積分爲：https://www.phpjabbers.com/how-to-make-a-php-calendar-php26-4.html

Answer 1

這似乎不太令人費解對我來說，與環內較少的處理。 DateInterval('P7D')只是意味着將間隔設置爲7天（1周） - 這可能是由於語法而輕微混淆的唯一部分。 DatePeriod()爲你做了所有的辛苦工作。

代碼（Demo）

$year=2018; // $_GET['year']; 
$next=$year+1; 
$start=new DateTime(date('Y-m-d', strtotime("first Monday of April $year"))); 
$stop=new DateTime(date('Y-m-d', strtotime("first Monday of April $next"))); 
// there is a known behavior of DatePeriod to stop before $stop (...not contain it) 
// See http://au2.php.net/manual/en/class.dateperiod.php for explanations & workarounds 
$range=new DatePeriod($start,new DateInterval('P7D'),$stop); 
echo "<table>"; 
    echo "<tr>"; 
     echo "<th colspan=\"8\">Financial Calendar $year-$next</th>"; 
    echo "</tr>"; 
    echo "<tr>"; 
     echo "<th>M</th><th>T</th><th>W</th><th>T</th><th>F</th><th>S</th><th>S</th><th>#</th>"; 
    echo "</tr>"; 
    foreach ($range as $i=>$date) { 
     echo "<tr>"; 
      echo "<td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>",++$i,"(",$date->format("Y-m-d"),")</td>"; 
     echo "</tr>"; 
    } 
echo "</table>"; 

輸出（未着色）：

<table> 
    <tr> 
     <th colspan="8">Financial Calendar 2018-2019</th> 
    </tr> 
    <tr> 
     <th>M</th><th>T</th><th>W</th><th>T</th><th>F</th><th>S</th><th>S</th><th>#</th> 
    </tr> 
    <tr> 
     <td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>1(2018-04-02)</td> 
    </tr> 
    <tr> 
     <td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>2(2018-04-09)</td> 
    </tr> 
    <tr> 
     <td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>3(2018-04-16)</td> 
    </tr> 
    ... 
    <tr> 
     <td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>50(2019-03-11)</td> 
    </tr> 
    <tr> 
     <td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>51(2019-03-18)</td> 
    </tr> 
    <tr> 
     <td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>52(2019-03-25)</td> 
    </tr> 
</table> 

現在，我不想搶你的開發自己這個代碼的機會，所以我我會在這裏停下來這應該會讓您立足於完成此項目以達到您所需的規格。

Answer 2

我希望以下邏輯適合您的需求。

<?php 

$begin = new DateTime(date('Y-m-d', strtotime('first Monday of April this year'))); 
$end  = new DateTime(date('Y-m-d', strtotime('last Monday of March next year'))); 
$interval = DateInterval::createFromDateString('1 week'); 

$weekNumberOfFirstMondayInApril = $begin->format('W'); 

foreach (new DatePeriod($begin, $interval, $end) as $dt) { 
    $phpWeekNum = $dt->format('W'); 

    $isFirstQuarter = ($phpWeekNum < $weekNumberOfFirstMondayInApril); 

    $businessWeekNum = $isFirstQuarter 
     ? ($phpWeekNum + (52 - $weekNumberOfFirstMondayInApril)) 
     : ($phpWeekNum - $weekNumberOfFirstMondayInApril) ; 

    echo 'Date: ' . $dt->format('l, Y-m-d') . PHP_EOL; 
    echo 'PHP week number: ' . $phpWeekNum . PHP_EOL; 
    echo 'Business week number: ' . ($businessWeekNum + 1) . PHP_EOL; 
    echo PHP_EOL; 
} 

它的輸出結果如下：

Date: Monday, 2017-04-03 
PHP week number: 14 
Business week number: 1 

    <snip> 

Date: Monday, 2017-12-25 
PHP week number: 52 
Business week number: 39 

Date: Monday, 2018-01-01 
PHP week number: 01 
Business week number: 40 

    <snip> 

Date: Monday, 2018-03-26 
PHP week number: 13 
Business week number: 52