[TYPO3-core] RFC: #2302: substitute all strtoupper/strtolower with the t3lib_div-method

[Peter Niederlag]

Hi,

Steffen Kamper schrieb:
> Hi,
[...]
> Problem: strtoupper and strtolower are not multibyte-safe. For this reason 
> we added 2 methods in t3lib_div sometime ago.

Are you sure? That's not what the manual states! http://php.net/strtoupper

> Now all calls in core to the native strtoupper/strtolower-functions should 
> use these functions in t3lib_div instead.

Just to give some impression I did a quick check of time measuremant:

// native 500 loops ~0.005
// t3lib_div::wrapper 500 loops ~0.001

// native 5000 loops ~0.04
// t3lib_div::wrapper 5000 loops ~0.09

The wrapper seems to take twice the time. IMO it should be used only
were needed! Is this surely needed everywhere?

Greets,
Peter
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