how to sort multidimensional associative array in php

Question

I have an array like below. I want to sort this multidimensional associative array using max price value.

<?php
    $car = array
        (
        '0' =>
        array('RoomType' => array
                (
                'price' => array(
                    'max_price' => '200'
                )
            )
        ),
        '1' =>
        array('RoomType' => array
                (
                'price' => array(
                    'max_price' => '400'
                )
            )
        )
    );
    ?>

Can you please help me on this regards? Thanks in Advance.

Answer 1

You can sort them by price by using array_multisort(). Consider this example:

$cars = array (
    '0' => array(
        'RoomType' => array (
            'price'=> array('max_price' => '200' )
    )
),
'1' => array(
    'RoomType' => array (
        'price'=> array( 'max_price' => '400' )
    )
),
'2' => array(
    'RoomType' => array (
        'price'=> array( 'max_price' => '100' )
    )
),
'3' => array(
    'RoomType' => array (
        'price'=> array( 'max_price' => '50' )
    )
)
);

$price = array();
foreach($cars as $key=> $value) {
    $price[] = $value['RoomType']['price']['max_price'];
}

// for ascending use SORT_ASC 
// for descending, use SORT_DESC
array_multisort($price, SORT_ASC, $cars);

print_r($cars);

Sample Output:

 Array
 (
     [0] => Array
         (
             [RoomType] => Array
                 (
                     [price] => Array
                         (
                             [max_price] => 50
                         )

                 )

         )

     [1] => Array
         (
             [RoomType] => Array
                 (
                     [price] => Array
                         (
                             [max_price] => 100
                         )

                 )

         )

     [2] => Array
         (
             [RoomType] => Array
                 (
                     [price] => Array
                         (
                             [max_price] => 200
                         )

                 )

         )

     [3] => Array
         (
             [RoomType] => Array
                 (
                     [price] => Array
                         (
                             [max_price] => 400
                         )

                 )

         )

 )