Sorry, for this double-post – but I missed some informations

I replaced utf8_decode() by iconv().
By changing this I’m able to use the charset Windows-1252. I needed this charset to get the correct encoded utf-8 character for the char €.

Please look at this post to get a detailed information about this unexpected behaviour:
http://www.unixresources.net/linux/lf/47/archive/00/00/16/76/167628.html#article722496

I had the same problem but in my case it had been even worse!
I had a character-mixup even in one line!

Here’s the code. Please read the comments to know how I fixed this problem:

[code]
// Use this option only if you know what you're doing!
$enableInlineEncoding = TRUE;
$lineEncoding = "ISO-8859-1";
$inlineEncoding = "Windows-1252";

function detectUTF8($string) {
return preg_match('%(?:
[\xC2-\xDF][\x80-\xBF] # non-overlong 2-byte
|\xE0[\xA0-\xBF][\x80-\xBF] # excluding overlongs
|[\xE1-\xEC\xEE\xEF][\x80-\xBF]{2} # straight 3-byte
|\xED[\x80-\x9F][\x80-\xBF] # excluding surrogates
|\xF0[\x90-\xBF][\x80-\xBF]{2} # planes 1-3
|[\xF1-\xF3][\x80-\xBF]{3} # planes 4-15
|\xF4[\x80-\x8F][\x80-\xBF]{2} # plane 16
)+%xs', $string);
}

function readStdInArray() {
$stdin = fopen('php://stdin', 'r');
$out = array();
if (is_resource($stdin)) {
while (!feof($stdin)) {
$in = trim(fgets($stdin));
if (strlen($in) > 0) {
$out[] = $in;
}
}
}
fclose($stdin);
return $out;
}

$std = readStdInArray();

//# Here's an example of my code.
//$std = array(
// "ä f\xFCr \x80 asdasd", // Sometimes there's a \x80 (€) saved as windows-1252 character and somethimes characters are valid utf-8 characters ...
// 'asäbc'
//);

foreach ($std as $line) {
if (detectUTF8($line)) {

if ($enableInlineEncoding) {
// replace all valid UTF8-character to ''
$string_without_utf8 = preg_replace('%(?:
[\xC2-\xDF][\x80-\xBF] # non-overlong 2-byte
|\xE0[\xA0-\xBF][\x80-\xBF] # excluding overlongs
|[\xE1-\xEC\xEE\xEF][\x80-\xBF]{2} # straight 3-byte
|\xED[\x80-\x9F][\x80-\xBF] # excluding surrogates
|\xF0[\x90-\xBF][\x80-\xBF]{2} # planes 1-3
|[\xF1-\xF3][\x80-\xBF]{3} # planes 4-15
|\xF4[\x80-\x8F][\x80-\xBF]{2} # plane 16
)+%xs', '', $line);

// get a list of all invalid UTF8-characters by counting all non-ascii characters in the string created above.
$count_invalid = preg_match_all("/[\x80-\xFF]/", $string_without_utf8, $matches);

// replace all invalid utf-8 characters by their utf8-encoded characters.
foreach ($matches[0] as $match) {
$line = str_replace($match, iconv($inlineEncoding, "UTF-8", $match), $line);
}
}

echo $line . PHP_EOL;
} else {
echo iconv($lineEncoding, "UTF-8", $line) . PHP_EOL;
}
}
[/code]