How Can I Sort a Multidimensional PHP Array by Multiple Fields?-PHP Tutorial-php.cn

How Can I Sort a Multidimensional PHP Array by Multiple Fields?

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Release： 2024-11-22 05:53:14

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How Can I Sort a Multidimensional PHP Array by Multiple Fields?

Sorting Multidimensional Arrays by Multiple Field Values

In PHP, sorting multidimensional arrays by multiple field values can be accomplished using array_multisort().

Consider the following array:

$data = [
    [
        "destination" => "Sydney",
        "airlines" => "airline_1",
        "one_way_fare" => 100,
        "return_fare" => 300
    ],
    [
        "destination" => "Sydney",
        "airlines" => "airline_2",
        "one_way_fare" => 150,
        "return_fare" => 350
    ],
    [
        "destination" => "Sydney",
        "airlines" => "airline_3",
        "one_way_fare" => 180,
        "return_fare" => 380
    ]
];

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To sort this array by return_fare in ascending order and one_way_fare in ascending order, use array_multisort():

// Extract specific fields into individual arrays
$return_fare = array_column($data, 'return_fare');
$one_way_fare = array_column($data, 'one_way_fare');

// Sort arrays using multiple criteria
array_multisort($return_fare, SORT_ASC, $one_way_fare, SORT_ASC, $data);

// Print sorted array
print_r($data);

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Alternative Methods:

array_orderby() Function: For a concise solution, consider using the array_orderby() function, which provides a wrapper around array_multisort().
**array_column() with array_multisort()**: To avoid iterating over the array, use array_column()` to extract the specific field values before sorting.

array_multisort(array_column($data, 'return_fare'), SORT_ASC,
                array_column($data, 'one_way_fare'), SORT_ASC,
                $data);

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