What are some potential pitfalls to avoid when sorting multidimensional arrays in PHP?

One potential pitfall to avoid when sorting multidimensional arrays in PHP is not specifying the correct sorting criteria for the inner arrays. If you want to sort the inner arrays based on a specific key value, you need to use a custom sorting function that compares the desired key values. 

// Example of sorting a multidimensional array by a specific key in the inner arrays
$users = [
    ['name' => 'John', 'age' => 30],
    ['name' => 'Alice', 'age' => 25],
    ['name' => 'Bob', 'age' => 35]
];

usort($users, function($a, $b) {
    return $a['age'] <=> $b['age'];
});

print_r($users);

Keywords

multidimensional arrays sorting PHP usort array_multisort

Related Questions