Gajus Gajus - 15 days ago 15
PHP Question

filter_var_array() multidimensional array

Any ideas why this does not work?

$_POST = array('edit' => array('name' => 'test'));

die(var_dump(
filter_var_array($_POST, array(
'edit["name"]' => FILTER_SANITIZE_STRING,
'edit[name]' => FILTER_SANITIZE_STRING,
)),
$_POST
));

Answer

Didn't know that filter_var_array() does not support recursion. Don't see no reasons why it shouldn't, though. Here is a simple solution:

// 28 01 2010, Gajus Kuizinas
function hp_path_to_array($keys, $value, $data = array())
{
    if(empty($keys))
    {
        return $value;
    }

    $key        = array_shift($keys);

    $data[$key] = hp_path_to_array($keys, $value, $data);


    return $data;
}

function hp_filter_var_array($data, $rules)
{
    $return = array();

    foreach($rules as $k => $options)
    {
        $path   = explode('[', str_replace(']', '', $k));

        if(empty($path))
        {
            continue;
        }

        if(!is_array($options))
        {
            $filter     = $options;
            $options    = array();
        }
        else
        {
            $filter     = $options['filter'];

            unset($options['filter']);
        }

        $value          = $data;

        foreach($path as $key)
        {
            if(isset($value[$key]))
            {
                $value  = $value[$key];
            }
            else
            {
                $value  = NULL;
                break;
            }
        }

        $return += hp_path_to_array($path, filter_var($value, $filter, $options));

        unset($rules[$k]);
    }

    $return += filter_var_array($data, $rules);

    return $return;
}
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