PHP to sort the array of special statement query results

Database query results can not be used directly, such as MySQL, such as the results in the statement, so you need to sort the results in some way.
Example 4. To sort the results of a database

In this example, each cell in the data array represents a row in a table. This is a typical collection of data for database records.

The data in the example are as follows:

Volume | Edition
-------+--------
67 | 2
86 | 1
85 | 6
98 | 2
86 | 6
67 | 7

The data is all stored in an array named data. This is usually achieved by looping through the database, such as MYSQL_FETCH_ASSOC ().

$data [] = Array (' volume ' =>, ' Edition ' => 2);
$data [] = Array (' volume ' =>, ' edition ' => 1);
$data [] = Array (' volume ' =>, ' Edition ' => 6);
$data [] = Array (' volume ' =>, ' Edition ' => 2);
$data [] = Array (' volume ' =>, ' Edition ' => 6);
$data [] = Array (' volume ' =>, ' edition ' => 7);
?>
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In this example, the volume is sorted in descending order and the edition in ascending order.

Now you have an array with rows, but Array_multisort () needs an array of columns, so use the following code to get the columns, and then sort.

Get a list of columns
foreach ($data as $key => $row) {
$volume [$key] = $row [' volume '];
$edition [$key] = $row [' Edition '];
}

Arranges data in descending order according to volume, sorted by edition ascending order
Sort the $data as the last parameter in a common key
Array_multisort ($volume, Sort_desc, $edition, SORT_ASC, $data);
?>

The data collection is now sorted, and the results are as follows:

Volume | Edition
-------+--------
98 | 2
86 | 1
86 | 6
85 | 6
67 | 2
67 | 7