对 foreach 循环结果进行排序

Question

I want to sort it by $distance base in foreach loop in my VIEWS.. so heres my code in Models

    $db = $this->getDbo();
    $query = $db->getQuery(true)
                ->select('*')
                ->from('#__load');

    $db->setQuery($query);               
    $db->query();
    $rows = $db->loadObjectList();
    return $db->loadObjectList();

This is the code in my View where i want to sort it by distance

  foreach ($this->items as $i => $item) {  
       $distance = $item->result1 * $item->result2        
  sort($distance)
}

echo $distance

result

3, 6, 2, 7, 8

i want to show like this

2, 3, 6, 7, 8

Answer 1

sort works on an array, and what you are doing is you are calling sort on every item in the array which wont work.

What you can do instead is do your foreach loop and then sort after:

  $array = [];
  foreach ($this->items as $i => $item) {  
      $distance = $item->result1 * $item->result2;        
      $array[] = $distance;
  }
  sort($array);
  var_dump($array);

https://www.php.net/manual/en/function.sort.php

Answer 2

First Convert your result $this->items into (array)$this->items and then use one of the following function:

sort() - sort arrays in ascending order
rsort() - sort arrays in descending order
asort() - sort associative arrays in ascending order, according to the value
ksort() - sort associative arrays in ascending order, according to the key
arsort() - sort associative arrays in descending order, according to the value
krsort() - sort associative arrays in descending order, according to the key

and get sorted value.

Answer 3

There are a few things here that don't make sense to me, so I'll blindly try to refactor your scripts and put all of the processing in the model where it belongs (you shouldn't be manipulating data in the view).

Untested snippet:

$db = $this->getDbo();
$query = $db->getQuery(true)
            ->select('result1 * result2')
            ->from('#__load')
            ->orderBy(1);
$db->setQuery($query);               
return $db->loadColumn();

Relevant pages to read:

• How can a query multiply 2 cell for each row MySQL?
• what is this order by 1?
• https://docs.joomla.org/Selecting_data_using_JDatabase

I expect that your view will now receive the following sorted and indexed array:

$this->items = [2, 3, 6, 7, 8];

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