Reordering an array by a child

[Adam]

Hi i've come across a problem in a PHP app I'm writing. I have a multidimensional array which looks like:

 

$breadcrumbs[] = array(
				'name' 			=> 'Computers',
				'title_order' 	=> 3,
				);

 

There's about 6 or 7 $breadcrumbs similar to that. Basically I need to reorder breadcrumbs by 'title_order'.

 

does anybody know how I could do that?

 

Say something like:

 

sort($breadcrumbs['title_order']);

 

Anybody have any ideas? Cheers! Adam

[Adam]

found a soloution..

 

function sortBreadcrumbs($a, $b) {
if ($a['title_order'] == $b['title_order']) {
	return 0;
} elseif ($a['title_order'] < $b['title_order']) {
	return -1;
} else {
	return 1;
}
}

usort($breadcrumbs, "sortBreadcrumbs");

 

cheers anyway!

[zenag]

use multisort...

$breadcrumbs[] = array(
               'name'          => 'Computers',
               'title_order'    => 3,
               );
		   
$breadcrumbs[] = array(
               'name'          => 'Computers',
               'title_order'    => 2,
               );
$breadcrumbs[] = array(
               'name'          => 'Computers',
               'title_order'    => 1,
               );
		   foreach ($breadcrumbs as $key => $row) {
    $title_order[]  = $row['title_order'];
   
}


$sort_order = SORT_ASC;
array_multisort($title_order, $sort_order, $breadcrumbs); 
print_r($breadcrumbs);			   
		  

[Adam]

cheers for the reply.

 

Which of our ways is the quickest and/or best?

[johnake]

You could try array_multisort:

 

<?

$breadcrumbs[] = array(
               'name'          => 'Computers',
               'title_order'    => 3,
               );
               

$breadcrumbs[] = array(
               'name'          => 'Printers',
               'title_order'    => 4,
               );
               
               
$breadcrumbs[] = array(
               'name'          => 'Misc.',
               'title_order'    => 5,
               );



foreach ($breadcrumbs as $key => $row) {
    $name[$key]  = $row['name'];
    $title_order[$key] = $row['title_order'];
    
}

array_multisort($title_order, SORT_ASC, $name, SORT_ASC, $breadcrumbs);

var_dump($breadcrumbs);



?>

[Adam]

cheers guys. Got it sorted in end using array_multisort !