数据库结果按月和年

Question

I have a Joomla 3.1 site that is going to show reports about contributions made. The reports should be divided into groups by month and year. I have a code that pulls data from database but cannot make it put each month into a separate <div> and each year into a parent <div> to its months. How is it done? Here is my code.

<?php 
$db = JFactory::getDbo();
$query = $db->getQuery(true);

$query->select(array($db->quoteName('contribution_date'), $db->quoteName('contribution_amount'), $db->quoteName('source')));
$query->from($db->quoteName('contribution'));

$db->setQuery($query);

$results = $db->loadObjectList();
?>

<table class='financial-reports'><th>aaa</th><th>bbb</th><th>ccc</th>
<?php
foreach ( $results as $result) {
   echo '<tr>' . '<td class="fin-rep-date">' . JFactory::getDate($result->contribution_date)->format('d M, Y') . '</td>' . 
                 '<td class="fin-rep-sum">' . $result->contribution_amount . ' ' .'руб.' . '</td>' . 
                 '<td class="fin-rep-source">' . $result->source . '</td>' . '</tr>';
}
?>
</table>

Answer 1

I think the easies way would be convert results into multi-dimensional array like this:

foreach ($results as $result) {
    $resultsArray[JFactory::getDate($result->contribution_date)->format('Y')][JFactory::getDate($result->contribution_date)->format('M')][] = $result;
}

And then you can use it like that:

<?php foreach ($resultsArray as $year) : ?>
   <div>
      <?php foreach ($year as $month) : ?>
        <div>
           <?php foreach ($month as $item) : ?> 
             <div>YOUR OUTPUT <?php echo $item->contribution_date; ?></div>
           <?php endforeach; ?>
        </div>
     <?php endforeach; ?>
   </div>
<?php endforeach; ?>