[TYPO3-core] RFC: #9575: use native filter_functions for validate and sanitize

[Steffen Kamper]

Hi,

for all are interested in deeper informations about the filter-functions 
here are some links:

[1] http://devzone.zend.com/node/view/id/1113
[2] http://php.net/filter
[3] http://us3.php.net/manual/hu/ref.filter.php (there is a table with 
all filter constants)

vg Steffen