joomla php sort array from high to low [duplicate] - php

Question

This question already has answers here:
How can I sort arrays and data in PHP?
(14 answers)
Sort array of objects by one property
(23 answers)
Closed 4 years ago.
I am trying to sort an array from high to low.
The query is written in an Joomla module and is this one:
$authors = array();
if (count($rows))
{
foreach ($rows as $row)
{
$author = JFactory::getUser($row->created_by);
$author->link = JRoute::_(K2HelperRoute::getUserRoute($author->id));
$query = "SELECT id, gender, description, image, url, `group`, plugins FROM #__k2_users WHERE userID=".(int)$author->id;
$db->setQuery($query);
$author->profile = $db->loadObject();
if ($params->get('authorAvatar'))
{
$author->avatar = K2HelperUtilities::getAvatar($author->id, $author->email, $componentParams->get('userImageWidth'));
}
if (K2_JVERSION != '15')
{
$languageCheck = '';
if ($application->getLanguageFilter())
{
$languageTag = JFactory::getLanguage()->getTag();
$languageCheck = "AND i.language IN (".$db->Quote($languageTag).", ".$db->Quote('*').") AND c.language IN (".$db->Quote($languageTag).", ".$db->Quote('*').")";
}
$query = "SELECT i.*, c.alias as categoryalias FROM #__k2_items as i
LEFT JOIN #__k2_categories c ON c.id = i.catid
WHERE i.created_by = ".(int)$author->id."
AND i.published = 1
AND i.access IN(".implode(',', $user->getAuthorisedViewLevels()).")
AND ( i.publish_up = ".$db->Quote($nullDate)." OR i.publish_up <= ".$db->Quote($now)." )
AND ( i.publish_down = ".$db->Quote($nullDate)." OR i.publish_down >= ".$db->Quote($now)." )
AND i.trash = 0 AND created_by_alias='' AND c.published = 1 AND c.access IN(".implode(',', $user->getAuthorisedViewLevels()).") AND c.trash = 0 {$languageCheck} ORDER BY created DESC";
}
else
{
$query = "SELECT i.*, c.alias as categoryalias FROM #__k2_items as i
LEFT JOIN #__k2_categories c ON c.id = i.catid
WHERE i.created_by = ".(int)$author->id."
AND i.published = 1
AND i.access <= {$aid}
AND ( i.publish_up = ".$db->Quote($nullDate)." OR i.publish_up <= ".$db->Quote($now)." )
AND ( i.publish_down = ".$db->Quote($nullDate)." OR i.publish_down >= ".$db->Quote($now)." )
AND i.trash = 0 AND created_by_alias='' AND c.published = 1 AND c.access <= {$aid} AND c.trash = 0 ORDER BY created DESC";
}
$db->setQuery($query, 0, 1);
$author->latest = $db->loadObject();
$author->latest->id = (int)$author->latest->id;
$author->latest->link = urldecode(JRoute::_(K2HelperRoute::getItemRoute($author->latest->id.':'.urlencode($author->latest->alias), $author->latest->catid.':'.urlencode($author->latest->categoryalias))));
$query = "SELECT COUNT(*) FROM #__k2_comments WHERE published=1 AND itemID={$author->latest->id}";
$db->setQuery($query);
$author->latest->numOfComments = $db->loadResult();
if ($params->get('authorItemsCounter'))
{
if (K2_JVERSION != '15')
{
$languageCheck = '';
if ($application->getLanguageFilter())
{
$languageTag = JFactory::getLanguage()->getTag();
$languageCheck = "AND language IN (".$db->Quote($languageTag).", ".$db->Quote('*').")";
}
$query = "SELECT COUNT(*) FROM #__k2_items WHERE {$where} published=1 AND ( publish_up = ".$db->Quote($nullDate)." OR publish_up <= ".$db->Quote($now)." ) AND ( publish_down = ".$db->Quote($nullDate)." OR publish_down >= ".$db->Quote($now)." ) AND trash=0 AND access IN(".implode(',', $user->getAuthorisedViewLevels()).") AND created_by_alias='' AND created_by={$row->created_by} {$languageCheck} AND EXISTS (SELECT * FROM #__k2_categories WHERE id= #__k2_items.catid AND published=1 AND trash=0 AND access IN(".implode(',', $user->getAuthorisedViewLevels()).") {$languageCheck} )";
}
else
{
$query = "SELECT COUNT(*) FROM #__k2_items WHERE {$where} published=1 AND ( publish_up = ".$db->Quote($nullDate)." OR publish_up <= ".$db->Quote($now)." ) AND ( publish_down = ".$db->Quote($nullDate)." OR publish_down >= ".$db->Quote($now)." ) AND trash=0 AND access<={$aid} AND created_by_alias='' AND created_by={$row->created_by} AND EXISTS (SELECT * FROM #__k2_categories WHERE id= #__k2_items.catid AND published=1 AND trash=0 AND access<={$aid} ) ";
}
$db->setQuery($query);
$numofitems = $db->loadResult();
$author->items = $numofitems;
}
$authors[] = $author;
}
}
return $authors;
}
then the result is passing to these variables and finally authors table is returned. This table I want to sort from high to low. I have tried the php functions but none of them seem to working.
I cannot be sure if the query retrieves something else beyond the items counter and set it as key. But I have tried functions such as arsort which is sorting by value and not key.
$db->setQuery($query);
$numofitems = $db->loadResult();
$author->items = $numofitems;
$authors[] = $author;
arsort($authors);
Any idea is appreciated
Thank you

Answer 1

Generally database queries can be sorted by specifying an order as in
$query->order('my_table.my_column desc')
If you're sorting a PHP array and require a custom sort criteria, you can use your own sort criteria with usort. For example:
// Your comparison function:
function myComparer($object1, $object2)
{
if ($object1->item == $object2->item) {
return 0;
}
return ($object1->item < $object2-item) ? -1 : 1;
}
// Sort the array in place
usort($authors, 'myComparer');
Note you can reverse the order of the sort by simply swapping the comparison return values:
return ($object1->itemCount < $object2-itemCount) ? 1 : -1;