[TYPO3-core] RFC #10838: t3lib_cs->utf8_decode() does not check whether the target charset is utf8

[Dmitry Dulepov]

Hi!

Ingo Renner wrote:
> Solution:
> A simple check for the target charset being utf8 solves the problem, the
> string can then be returned as is.

I propose to change:

if ($charset === 'utf-8')	return $str;

to:

if (strcasecmp($charset, 'utf-8') === 0) {
	return $str;
}

Reasons:
- conforms to CGL
- case-insensitive comparison

-- 
Dmitry Dulepov
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