What is the function array_multisort() used for in PHP?

The function array_multisort() in PHP is used to sort multiple arrays or a multi-dimensional array by one or more key values. This function allows you to sort arrays in ascending or descending order based on the values of one or more columns. It is particularly useful when you need to sort arrays with multiple criteria. 

// Example of using array_multisort() to sort a multi-dimensional array by a specific key
$users = array(
    array("id" => 1, "name" => "Alice", "age" => 30),
    array("id" => 2, "name" => "Bob", "age" => 25),
    array("id" => 3, "name" => "Charlie", "age" => 35)
);

// Sort the array by age in ascending order
array_multisort(array_column($users, 'age'), SORT_ASC, $users);

// Print the sorted array
print_r($users);

Keywords

array_multisort sorting multidimensional arrays PHP function data manipulation

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