What are the differences between using array_multisort() and usort() for sorting multidimensional arrays in PHP?

When sorting multidimensional arrays in PHP, array_multisort() is typically used when sorting by multiple keys, while usort() is used when custom sorting logic is needed. Array_multisort() is more efficient for sorting by multiple keys, as it can handle sorting on multiple levels of the array. Usort() allows for more flexibility in sorting logic, as a custom comparison function can be defined. 

// Using array_multisort() to sort a multidimensional array by multiple keys
$data = [
    ["name" => "John", "age" => 30],
    ["name" => "Jane", "age" => 25],
    ["name" => "Bob", "age" => 35]
];

array_multisort(array_column($data, 'age'), SORT_ASC, $data);

print_r($data);

Keywords

array_multisort usort sorting multidimensional arrays PHP

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