Blacklist

This filter will return null if the value being filtered is present in the filter’s list of values. If the value is not present, it will return that value.

For the opposite functionality see the Whitelist filter.

Supported Options

The following options are supported for Zend\Filter\Blacklist:

• strict: Uses strict mode when comparing: passed through to in_array‘s third argument.
• list: An array of forbidden values.

Basic Usage

This is a basic example:

$blacklist = new \Zend\Filter\Blacklist(array(
    'list' => array('forbidden-1', 'forbidden-2')
));
echo $blacklist->filter('forbidden-1'); // => null
echo $blacklist->filter('allowed');     // => 'allowed'