Creating a weekly calendar in php

Question

I created a calendar that will show one week at a time. Here is the code I created

<?php $week = date("W"); $year = (isset($_GET['year']))?$_GET['year']:date("Y"); $week = (isset($_GET['week']))?$_GET['week']:Date('W'); if($week>53){ $year+= 1; $week=1; } ?> <a href="<?php echo $_SERVER['PHP_SELF'].'?week='.($week+1).'&year='.$year; ?>">Next Week</a> <!--Next week--> <a href="<?php echo $_SERVER['PHP_SELF'].'?week='.($week-1).'&year='.$year; ?>">Pre Week</a> <!--Previous week--> <table border="1px"> <tr> <td>Employee</td> <?php for($day=1; $day<=7; $day++) { $d = strtotime($year."W".$week.$day); echo "<td>".date('l',$d )."<br>"; echo date('d M',$d)."</td>"; } ?> </tr> 

When I try to switch to the next week, it works correctly. But when the year changes, it does not work for the next year.

Answer 1

Leave the week calculation in the DateTime :: setIsoDate () method.

Here is the easiest and best solution for your problem:

 <?php $dt = new DateTime; if (isset($_GET['year']) && isset($_GET['week'])) { $dt->setISODate($_GET['year'], $_GET['week']); } else { $dt->setISODate($dt->format('o'), $dt->format('W')); } $year = $dt->format('o'); $week = $dt->format('W'); ?> <a href="<?php echo $_SERVER['PHP_SELF'].'?week='.($week-1).'&year='.$year; ?>">Pre Week</a> <!--Previous week--> <a href="<?php echo $_SERVER['PHP_SELF'].'?week='.($week+1).'&year='.$year; ?>">Next Week</a> <!--Next week--> <table> <tr> <td>Employee</td> <?php do { echo "<td>" . $dt->format('l') . "<br>" . $dt->format('d M Y') . "</td>\n"; $dt->modify('+1 day'); } while ($week == $dt->format('W')); ?> </tr> </table> 

Answer 2

When you use strtotime , your week should be double-digit . You must add zero if the week is less than 10 before the for loop.

 if($week < 10) { $week = '0'. $week; } for($day = 1; $day <= 7; $day++) { 

In addition, during the year only 52 weeks, the condition at the beginning should be.

 if($week > 52) { $year++; $week = 1; } elseif($week < 1) { // If you want the possibility to go back too $year--; $week = 52; } 

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Full code:

 <?php $year = (isset($_GET['year'])) ? $_GET['year'] : date("Y"); $week = (isset($_GET['week'])) ? $_GET['week'] : date('W'); if($week > 52) { $year++; $week = 1; } elseif($week < 1) { $year--; $week = 52; } ?> <a href="<?php echo $_SERVER['PHP_SELF'].'?week='.($week == 52 ? 1 : 1 + $week).'&year='.($week == 52 ? 1 + $year : $year); ?>">Next Week</a> <!--Next week--> <a href="<?php echo $_SERVER['PHP_SELF'].'?week='.($week == 1 ? 52 : $week -1).'&year='.($week == 1 ? $year - 1 : $year); ?>">Pre Week</a> <!--Previous week--> <table border="1px"> <tr> <td>Employee</td> <?php if($week < 10) { $week = '0'. $week; } for($day= 1; $day <= 7; $day++) { $d = strtotime($year ."W". $week . $day); echo "<td>". date('l', $d) ."<br>". date('d M', $d) ."</td>"; } ?> </tr> </table>