Description:
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Flags and options for filters are just listed, but not described, for filters. A user must guess what it should do and/or look into PHP source code (for example to see what separators are allowed when FILTER_FLAG_ALLOW_THOUSAND flag is provided).

http://cz.php.net/manual/en/filter.filters.validate.php
http://cz.php.net/manual/en/filter.filters.sanitize.php
http://cz.php.net/manual/en/filter.filters.misc.php

Test script:
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N/A

Expected result:
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All options and flags are fully documented and described.

Actual result:
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The options and flags are just listed, not described.