Description:
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When iconv is used for transliteration on Linux, characters such as ä become ae. On Windows, iconv returns "a instead of ae (note the double quote before the letter).

Test script:
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$utf8_umlaut_a = 'ä';

// On Linux ä = ae
setlocale(LC_CTYPE, 'de_DE');
echo iconv('UTF-8', 'ASCII//TRANSLIT', $utf8_umlaut_a);

// On Windows ä = "a
setlocale(LC_CTYPE, 'german');
echo iconv('UTF-8', 'ASCII//TRANSLIT', $utf8_umlaut_a);

Expected result:
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On Windows iconv should return the same result as on Linux. ä should be returned as ae and not "a.

Actual result:
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ä becomes "a.