note 96752 deleted from function.sort by danbrown
| From: | danbrown@php.net | Date: | Fri, 06 Jan 2012 19:09:26 +0000 |
| Subject: | note 96752 deleted from function.sort by danbrown | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-185402@lists.php.net to get a copy of this message | ||
Note Submitter: SoftwareJonas
----
Use eval() with array_multisort() to sort multiple columns:
<?php
function multisort($array, $sort_by) {
foreach ($array as $key => $value) {
$evalstring = '';
foreach ($sort_by as $sort_field) {
$tmp[$sort_field][$key] = $value[$sort_field];
$evalstring .= '$tmp[\'' . $sort_field . '\'], ';
}
}
$evalstring .= '$array';
$evalstring = 'array_multisort(' . $evalstring . ');';
eval($evalstring);
return $array;
}
$test = array(
array( 'a' => '1', 'b' => '3'),
array( 'a' => '2', 'b' => '1'),
array( 'a' => '1', 'b' => '1'));
echo 'Unsorted: ';
print_r($test);
$result = multisort( $test , array('a','b') );
echo 'Sorted: ';
print_r($result);
?>
Result:
Unsorted: Array
(
[0] => Array
(
[a] => 1
[b] => 3
)
[1] => Array
(
[a] => 2
[b] => 1
)
[2] => Array
(
[a] => 1
[b] => 1
)
)
Sorted: Array
(
[0] => Array
(
[a] => 1
[b] => 1
)
[1] => Array
(
[a] => 1
[b] => 3
)
[2] => Array
(
[a] => 2
[b] => 1
)
)