Автоматически определяем кодировку. PHP

<?
define("LOWERCASE",3);

define("UPPERCASE",1);

function detect_cyr_charset($str) {

$charsets = Array(

"k" => 0,

"w" => 0,

"d" => 0,

"i" => 0,

"m" => 0

);

for ( $i = 0, $length = strlen($str); $i < $length; $i++ ) {

$char = ord($str[$i]);

//non-russian characters

if ($char < 128 || $char > 256) continue;

//CP866

if (($char > 159 && $char < 176) || ($char > 223 && $char < 242))

$charsets["d"]+=LOWERCASE;

if (($char > 127 && $char < 160)) $charsets["d"]+=UPPERCASE;

//KOI8-R

if (($char > 191 && $char < 223)) $charsets["k"]+=LOWERCASE;

if (($char > 222 && $char < 256)) $charsets["k"]+=UPPERCASE;

//WIN-1251

if ($char > 223 && $char < 256) $charsets["w"]+=LOWERCASE;

if ($char > 191 && $char < 224) $charsets["w"]+=UPPERCASE;

//MAC

if ($char > 221 && $char < 255) $charsets["m"]+=LOWERCASE;

if ($char > 127 && $char < 160) $charsets["m"]+=UPPERCASE;

//ISO-8859-5

if ($char > 207 && $char < 240) $charsets["i"]+=LOWERCASE;

if ($char > 175 && $char < 208) $charsets["i"]+=UPPERCASE;

}

arsort($charsets);

return key($charsets);

}

?>