I have this array:
$animals = array(
'0' => array('name' => 'cat', 'order' => '2'),
'1' => array('name' => 'dog', 'order' => '1'),
'2' => array('name' => 'fish', 'order' => '3')
);
I want to turn it into this:
$animals = array(
'1' => array('name' => 'dog', 'order' => '1'),
'0' => array('name' => 'cat', 'order' => '2'),
'2' => array('name' => 'fish', 'order' => '3')
);
As you can see I want to sort based on the order key. How to do this?
Use PHP's native usort function with a userdefined callback reading the order fields.
If maintaining index association is critical use uasort instead.
You could use array_multisort()
$animals = array(
'0' => array('name' => 'cat', 'order' => '2'),
'1' => array('name' => 'dog', 'order' => '1'),
'2' => array('name' => 'fish', 'order' => '3')
);
$tmp = array();
foreach($animals as $k=>$r){
$tmp[] = $r['order'];
}
array_multisort($tmp,SORT_ASC,$animals); // SORT_DESC to reverse
echo '<pre>',print_r($animals),'</pre>';
Try this...using usort()
$animals = array(
'0' => array('name' => 'cat', 'order' => '2'),
'1' => array('name' => 'dog', 'order' => '1'),
'2' => array('name' => 'fish', 'order' => '3')
);
function build_sorter($key) {
return function ($a, $b) use ($key) {
return strnatcmp($a[$key], $b[$key]);
};
}
usort($animals, build_sorter('order'));
var_dump($animals);
