Detailed explanation of the use cases of the two-dimensional array sorting function array_orderby

This time I will bring you two-dimensional Array sortingDetailed explanation of the use cases of the function array_orderby. What are the precautions for using the two-dimensional array sorting function array_orderby. The following is a practical case. Let's take a look.

<?php
/**
I came up with an easy way to sort database-style results. This does what example 3 does, except it takes care of creating those intermediate arrays for you before passing control on to array_multisort(). 
*/
function array_orderby()
{
  $args = func_get_args();
  $data = array_shift($args);
  foreach ($args as $n => $field) {
    if (is_string($field)) {
      $tmp = array();
      foreach ($data as $key => $row)
        $tmp[$key] = $row[$field];
      $args[$n] = $tmp;
      }
  }
  $args[] = &$data;
  call_user_func_array(&#39;array_multisort&#39;, $args);
  return array_pop($args);
}
/*
The sorted array is now in the return value of the function instead of being passed by reference.
*/
$data[] = array(&#39;volume&#39; => 67, &#39;edition&#39; => 2);
$data[] = array(&#39;volume&#39; => 86, &#39;edition&#39; => 1);
$data[] = array(&#39;volume&#39; => 85, &#39;edition&#39; => 6);
$data[] = array(&#39;volume&#39; => 98, &#39;edition&#39; => 2);
$data[] = array(&#39;volume&#39; => 86, &#39;edition&#39; => 6);
$data[] = array(&#39;volume&#39; => 67, &#39;edition&#39; => 7);
// Pass the array, followed by the column names and sort flags
$sorted = array_orderby($data, &#39;volume&#39;, SORT_DESC, &#39;edition&#39;, SORT_ASC);
print_r($sorted)
?>

Run results:

Array
(
  [0] => Array
    (
      [volume] => 98
      [edition] => 2
    )
  [1] => Array
    (
      [volume] => 86
      [edition] => 1
    )
  [2] => Array
    (
      [volume] => 86
      [edition] => 6
    )
  [3] => Array
    (
      [volume] => 85
      [edition] => 6
    )
  [4] => Array
    (
      [volume] => 67
      [edition] => 2
    )
  [5] => Array
    (
      [volume] => 67
      [edition] => 7
    )
)

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

Recommended reading:

ThinkPHP database connection operation case analysis

ThinkPHP framework PDO connection database steps detailed explanation

The above is the detailed content of Detailed explanation of the use cases of the two-dimensional array sorting function array_orderby. For more information, please follow other related articles on the PHP Chinese website!