Description:
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Hi there!

On http://de.php.net/manual/en/function.setlocale.php
the description of "string setlocale ( mixed category, array locale)" says
"If locale is NULL or "0", the locale setting is not affected, only the current setting is returned."

On my Gentoo Box I figured out that giving "NULL" behaves different to "0".
After setting the LC_ALL from the C locale to "de_DE" (or anything else) "setlocale(LC_ALL, 0)" worked correctly and returnd all locale Variables with their values set to "de_DE" (as expected). Refering to the Documentation I expected the same result from "setlocale(LC_ALL, NULL) but I didn`t get it.
It just set all locale vaiables back to the default C Value.

Thanks for your efforts,
Uli

Reproduce code:
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<?php                                                                                
echo "Default locale: " . setlocale(LC_ALL, 0) . "<br />";
setlocale(LC_ALL, "de_DE");                                                                                
$locales = explode(";", setlocale(LC_ALL, NULL));                                                                                
echo "New locale: ";
print_r($locales);                                                                                
?>

Expected result:
----------------
Default locale: C
New locale: Array ( [0] => LC_CTYPE=de_DE [1] => LC_NUMERIC=C [2] => LC_TIME=de_DE [3] => LC_COLLATE=de_DE [4] => LC_MONETARY=de_DE [5] => LC_MESSAGES=de_DE [6] => LC_PAPER=de_DE [7] => LC_NAME=de_DE [8] => LC_ADDRESS=de_DE [9] => LC_TELEPHONE=de_DE [10] => LC_MEASUREMENT=de_DE [11] => LC_IDENTIFICATION=de_DE )

Actual result:
--------------
Default locale: C
New locale: Array ( [0] => C )