Easy way to apply a function to an array

Question

I am aware of array_walk() and array_map(). However when using the former like so (on an old project) it failed

array_walk($_POST,          


        

Answer 1

PHP 7.4 style:

$link = mysqli_connect("localhost", "my_user", "my_password", "world");

array_map(fn($string) => mysqli_real_escape_string($string, $link), $_POST);