Swap first and last array in multidimensional array

Question

I have a multidimensional array in the following format

$pet = array(
     array(
            'name' => 'Chew Barka',
            'breed' => 'Bichon',
            'age'  => '2 years',
            'weight' => 8,
         'bio'   => 'The park, The pool or the Playground - I love to go anywhere! I am really great at... SQUIRREL!',
            'filename' => 'pet1.png'
    ),
    array(
            'name' => 'Spark Pug',
            'breed' => 'Pug',
            'age'  => '1.5 years',
            'weight' => 11,
            'bio'   => 'You want to go to the dog park in style? Then I am your pug!',
            'filename' => 'pet2.png'
    ),
    array(
        'name' => 'Pico de Gato',
            'breed' => 'Bengal',
            'age'  => '5 years',
            'weight' => 9,
            'bio'   => 'Oh hai, if you do not have a can of salmon I am not interested.',
            'filename' => 'pet3.png'
    ),
    array(
        'name' => 'Name',
            'breed' => 'Breed',
            'age'  => 'Age',
            'weight' => 'Weight',
            'bio'   => 'Biography',
            'filename' => 'Filename'
    )
);

I need to swap the last array with the first. I tried to do this

function arraySwap(&$array, $swap_a, $swap_b){
    list($array[$swap_a], $array[$swap_b]) = array($array[$swap_b], $array[$swap_a]);
}

This does swap the arrays first with last. However what i need is to push the arrays bellow. So once i swap the last array with the first, the first needs to come to position 1, the one at position 1 goes to 2 etc.

Can anybody point me in the right direction?

Answer 1

I think you are just interested to shift the heading array on the top, you can do some circular array shifting like below

$arr = array(
     array(
            'name' => 'Chew Barka',
            'breed' => 'Bichon',
            'age'  => '2 years',
            'weight' => 8,
         'bio'   => 'The park, The pool or the Playground - I love to go anywhere! I am really great at... SQUIRREL!',
            'filename' => 'pet1.png'
    ),
    array(
            'name' => 'Spark Pug',
            'breed' => 'Pug',
            'age'  => '1.5 years',
            'weight' => 11,
            'bio'   => 'You want to go to the dog park in style? Then I am your pug!',
            'filename' => 'pet2.png'
    ),
    array(
        'name' => 'Pico de Gato',
            'breed' => 'Bengal',
            'age'  => '5 years',
            'weight' => 9,
            'bio'   => 'Oh hai, if you do not have a can of salmon I am not interested.',
            'filename' => 'pet3.png'
    ),
    array(
        'name' => 'Name',
            'breed' => 'Breed',
            'age'  => 'Age',
            'weight' => 'Weight',
            'bio'   => 'Biography',
            'filename' => 'Filename'
    )
);

echo "<pre>";
$key=count($arr)-1;
$output1 = array_slice($arr, $key); 
$output2 = array_slice($arr, 0,$key); 
$new=array_merge($output1,$output2);
print_r($new);

Output

Array
(
    [0] => Array
        (
            [name] => Name
            [breed] => Breed
            [age] => Age
            [weight] => Weight
            [bio] => Biography
            [filename] => Filename
        )

    [1] => Array
        (
            [name] => Chew Barka
            [breed] => Bichon
            [age] => 2 years
            [weight] => 8
            [bio] => The park, The pool or the Playground - I love to go anywhere! I am really great at... SQUIRREL!
            [filename] => pet1.png
        )

    [2] => Array
        (
            [name] => Spark Pug
            [breed] => Pug
            [age] => 1.5 years
            [weight] => 11
            [bio] => You want to go to the dog park in style? Then I am your pug!
            [filename] => pet2.png
        )

    [3] => Array
        (
            [name] => Pico de Gato
            [breed] => Bengal
            [age] => 5 years
            [weight] => 9
            [bio] => Oh hai, if you do not have a can of salmon I am not interested.
            [filename] => pet3.png
        )

)