array_sort_numeric_column.php

<?php

$json = <<<'EOD'
[
    {
        "id": 1,
        "name": "Sopa de castanha do par\u00e1",
        "price": 9.82,
        "specifications": [
            "low-carb"
        ]
    },
    {
        "id": 2,
        "name": "C\u00e1psulas de castanha do par\u00e1",
        "price": 2.37,
        "specifications": [
            "lactose-free",
            "low-carb"
        ]
    },
    {
        "id": 3,
        "name": "Chips de milho",
        "price": 7.24,
        "specifications": [
            "low-carb",
            "vegan",
            "gluten-free",
            "vegetarian",
            "lactose-free"
        ]
    }
]
EOD;

$products = json_decode($json, true);

function array_sort_numeric_column($array, $column, $asc = true)
{
    $index = $asc ? 0 : 1;
    usort($array, function () use ($column, $index) {
        $args = func_get_args();
        $a = $args[$index];
        $b = $args[abs($index - 1)];
        return $a[$column] == $b[$column] ? 1 :
            $a[$column] < $b[$column] ? -1 : 1;
    });

    return $array;
}

function custom_print($array)
{
    foreach ($array as $values) {
        echo sprintf(
                "%s - %s %s", 
                $values['id'], 
                $values['price'],
                $values['name']
            ) . PHP_EOL;
    }
    
    echo PHP_EOL;
}

custom_print(array_sort_numeric_column($products, 'price', true));
custom_print(array_sort_numeric_column($products, 'price', false));
custom_print(array_sort_numeric_column($products, 'id', true));
custom_print(array_sort_numeric_column($products, 'id', false));

/*
 # Output 
 
 2 - 2.37 Cápsulas de castanha do pará
 3 - 7.24 Chips de milho
 1 - 9.82 Sopa de castanha do pará

 1 - 9.82 Sopa de castanha do pará
 3 - 7.24 Chips de milho
 2 - 2.37 Cápsulas de castanha do pará

 1 - 9.82 Sopa de castanha do pará
 2 - 2.37 Cápsulas de castanha do pará
 3 - 7.24 Chips de milho

 3 - 7.24 Chips de milho
 2 - 2.37 Cápsulas de castanha do pará
 1 - 9.82 Sopa de castanha do pará
 
*/