how to use filter_input NO $_POST

Question

Good use the filter_input thus:

filter_input(INPUT_POST, 'nome_input', FILTER_SANITIZE_SPECIAL_CHARS);

I wonder how I can use it in $_POST for all input, without giving the name.

Answer 1

Just get all the field names with the function array_keys and iterate on them:

foreach(array_keys($_POST) as $var)
{
    $filtered[$var] = filter_input(INPUT_POST, $var, FILTER_SANITIZE_SPECIAL_CHARS);
}

In this way, $filtered will have all the values of $_POST after passing through the filter.

You can alternatively use the function array_map:

$filtered = array_map(function ($var) {
    return filter_input(INPUT_POST, $var, FILTER_SANITIZE_SPECIAL_CHARS);
}, $_POST);