How can you handle sorting an array based on three attributes in PHP, with priority given to each attribute in a specific order?

When sorting an array based on three attributes in PHP with priority given to each attribute in a specific order, you can use the `usort()` function along with a custom comparison function. In the comparison function, you can compare the three attributes in the desired order of priority. This allows you to sort the array based on the specified attributes. 

// Sample array with three attributes: name, age, and salary
$data = [
    ['name' => 'Alice', 'age' => 30, 'salary' => 50000],
    ['name' => 'Bob', 'age' => 25, 'salary' => 60000],
    ['name' => 'Charlie', 'age' => 35, 'salary' => 45000]
];

// Custom comparison function to sort the array based on three attributes with priority
usort($data, function($a, $b) {
    if ($a['name'] != $b['name']) {
        return $a['name'] <=> $b['name'];
    } elseif ($a['age'] != $b['age']) {
        return $a['age'] <=> $b['age'];
    } else {
        return $a['salary'] <=> $b['salary'];
    }
});

// Output the sorted array
print_r($data);

Keywords

PHP array sorting multi-attribute sorting usort custom sorting algorithm

Related Questions