How can PHP developers efficiently handle multidimensional arrays and maintain data integrity in their applications?

PHP developers can efficiently handle multidimensional arrays and maintain data integrity in their applications by using functions like array_push(), array_merge(), and array_column() to add, merge, or extract data from arrays. They can also use loops like foreach or for to iterate through multidimensional arrays and perform operations on each element. Additionally, developers should validate input data to ensure it matches the expected structure before manipulating it to prevent errors and maintain data integrity.

// Example of adding data to a multidimensional array using array_push()
$users = [
    ['name' => 'John', 'age' => 30],
    ['name' => 'Jane', 'age' => 25]
];

$newUser = ['name' => 'Alice', 'age' => 28];
array_push($users, $newUser);

print_r($users);