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

[Martin Kutschker]

Steffen Kamper schrieb:
> Hi,
> 
> there is a different behaviour to the prior state.
> 
> As the function eg validEmail before returns false/true,
> the php filter-functions return false/input string (which is that was
> the name says, it filters .-))
> 
> Most users won't discover, as 98% are testing validEmail with
> if (!t3lib_div::validEmail($email)) { ... }
> 
> So 2 possibilities:
> 1) leave it as it is and change the phpdoc for return var
> 2) change return var to boolean
> 
> i would vote for 1) but i see compatibility too with 2)

2) as our funcion isn't a filter.

return filter_var($ip, FILTER_VALIDATE_IP)===false ? false : true;

Masi