Fixed #3878 and #3901: function filter_var missing

Till Brehm

2016-05-26 30aae443d7732380a9f0c243d88015132a9a2875

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<?php
$wb['description_txt'] = 'Description';
$wb['name_txt'] = 'Group';
$wb['name_err'] = 'Group must be min 1, max 30 Chars.';
?>