PHP need to trim all the $_POST variables

Question

Need you help in an unusal situation. I need to trim all the $_POST variables.

Is there any way I can do it at a single shot i.e., using a single function?

I know trim($_POST) won't do, I have to make some function like

function sanatize_post(){
    foreach ($_POST as $key => $val)
        $_POST[$key] = trim($val);
}

But, if you have any other suggestion or comment, please help me.

Thanks

Answer 1

Simply

  $_POST = array_map("trim", $_POST);

But if $_POST members (even if 1 of them) is again an array itself, then use recursive version:

    function array_map_deep( $value, $callback ) 
    {
        if ( is_array( $value ) ) {
            foreach ( $value as $index => $item ) {
                    $value[ $index ] = array_map_deep( $item, $callback );
            }
        } elseif ( is_object( $value ) ) {
            $object_vars = get_object_vars( $value );
            foreach ( $object_vars as $property_name => $property_value ) {
                    $value->$property_name = array_map_deep( $property_value, $callback );
            }
        } else {
            $value = call_user_func( $callback, $value );
        }
        return $value;
    }

Answer 2

Here's a one-liner that will also work either on single values or recursively on arrays:

$_POST = filter_var($_POST, \FILTER_CALLBACK, ['options' => 'trim']);