Sorting of Mutlidimensinal Array

Question

I have following array

    Array(
           [0]= Array
               ( 
              [name]=>room
             other paramters

            )
       [1]=Array (
         [name]=>abc
        and so on

    )

   )

I want to sort by name

i tried to use usort. but i am not able to get proper results

usort($array,'sort_by_name');
function sort_by_name($a,$b) {
 return $a- $b;
}

Any idea?

Thanks

usort() is probably not what you need, and without showing the rest of the code we can only assume you're not using it correctly. Try ksort(). — Waxi
– Waxi, Commented Jan 28, 2015 at 18:30
@slime ksort would sort by the key, not the value. As in the 0 and 1. @OP usort is correct and in your compare function just use something like return strcasecmp($a['name'], $b['name']); in your compare function. php already has a string comparison function that returns the proper values, you just need to reference the key. — Jonathan Kuhn
– Jonathan Kuhn, Commented Jan 28, 2015 at 18:33
function sort_by_name($a,$b) { return strcmp($a['name'], $b['name']); } perhaps? — Mark Baker
– Mark Baker, Commented Jan 28, 2015 at 18:39

Max Flex · Accepted Answer · 2015-01-28 18:42:58Z

1

You should use array_multisort. For your particular example, where $array is the initial array:

$names = array();
foreach ($array as $key => $row)
{
    $names[$key] = $row['name'];
}
array_multisort($names, SORT_ASC, $array);

edited Jan 28, 2015 at 18:42

answered Jan 28, 2015 at 18:36

Max Flex

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Sixthpoint · Accepted Answer · 2015-01-28 18:36:09Z

This method allows you to sort data in a direction, specify a field, and say if the field is a date.

private function multiSort($data, $sortDirection, $field, $isDate) {
if (empty($data) || !is_array($data) || count($data) < 2) {
    return $data;
}

$parts = explode("/", $field);
foreach ($data as $key => $row) {
    $temp = &$row;
    foreach ($parts as $key2) {
        $temp = &$temp[$key2];
    }
    $orderByDate[$key] = ($isDate ? strtotime($temp) : $temp);
}
unset($temp);
unset($parts);

if ($sortDirection == "SORT_DESC") {
    array_multisort($orderByDate, SORT_DESC, $data);
} else {
    array_multisort($orderByDate, SORT_ASC, $data);
}
unset($orderByDate);
return $data;
}

This blog post should be helpful: Multisort by key

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