CODEWITHSUNDEEP
phparrays
user967451
user967451

Reputation:

PHP: Is there a better way to reorder values of an array?

I have this array:

$pets = array(
   'cat' => 'Lushy',
   'dog' => 'Fido',
   'fish' => 'Goldie' 
);

If I need to reorder the arrays by having:

fish
dog
cat

in that order and assuming that any of those values may or may not be present, is there a better way than:

$new_ordered_pets = array();

if(isset($pets['fish'])) {
    $new_ordered_pets['fish'] = $pets['fish'];      
}
if(isset($pets['dog'])) {
    $new_ordered_pets['dog'] = $pets['dog'];        
}
if(isset($pets['cat'])) {
    $new_ordered_pets['cat'] = $pets['cat'];        
}

var_dump($new_ordered_pets);

outputs:

Array
(
    [fish] => Goldie
    [dog] => Fido
    [cat] => Lushy
)

Is there a cleaner way, perhaps some inbuilt function I'm not aware of that you simply supply the array to be reordered and the indexes you would like it to be recorded by and it does the magic?

Upvotes: 1

Views: 95

Answers (3)

hakre
hakre

Reputation: 197682

You already have the order, so you only need to assign values (Demo):

$sorted = array_merge(array_flip($order), $pets);

print_r($sorted);

Output:

Array
(
    [fish] => Goldie
    [dog] => Fido
    [cat] => Lushy
)

Related: Sort an array based on another array?

Upvotes: 2

gen_Eric
gen_Eric

Reputation: 227230

You can use uksort to sort your array (by keys) based on another array (this will work in PHP 5.3+ only):

$pets = array(
   'cat' => 'Lushy',
   'dog' => 'Fido',
   'fish' => 'Goldie' 
);
$sort = array(
    'fish',
    'dog',
    'cat'
);
uksort($pets, function($a, $b) use($sort){
    $a = array_search($a, $sort);
    $b = array_search($b, $sort);

    return $a - $b;
});

DEMO: http://codepad.viper-7.com/DCDjik

Upvotes: 3

Jeshurun
Jeshurun

Reputation: 23186

What you need is uksort.

// callback 
function pets_sort($a,$b) {
    // compare input vars and return less than, equal to , or greater than 0. 
} 

uksort($pets, "pets_sort");

Upvotes: 0

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