How to Sort a Multidimensional Array in PHP by an Inner Array\'s Field?-PHP Tutorial-php.cn

How to Sort a Multidimensional Array in PHP by an Inner Array\'s Field?

Linda Hamilton

Release： 2024-11-29 06:14:10

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How to Sort a Multidimensional Array in PHP by an Inner Array's Field?

Sorting Multidimensional Arrays by Inner Array Field in PHP [duplicate]

Consider a multidimensional array representing a database-like structure, where each element denotes a row with inner arrays containing field name-value pairs. For instance:

Array
(
    [0] => Array
        (
            [name] => 'Sony TV'
            [price] => 600.00
        )

    [1] => Array
        (
            [name] => 'LG TV'
            [price] => 350.00
        )

    [2] => Array
        (
            [name] => 'Samsung TV'
            [price] => 425.00
        )  
}

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The goal is to sort these rows based on the "price" field. The desired result is:

Array
(
    [0] => Array
        (
            [name] => 'LG TV'
            [price] => 350.00
        )

    [1] => Array
        (
            [name] => 'Samsung TV'
            [price] => 425.00
        )

    [2] => Array
        (
            [name] => 'Sony TV'
            [price] => 600.00
        )        
}

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Solution:

To achieve this sorting, PHP offers the following simple solution:

array_multisort(array_column($yourArray, "price"), SORT_ASC, $yourArray);

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Alternatively, the following snippet can be used to preserve outer array keys:

$col = array_column($yourArray, "price");
array_multisort($col, SORT_ASC, SORT_NUMERIC, $yourArray);

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