以下为引用的内容：

require_once (\"func_ip.php\");

function u2utf8($c) {

$str = \"\";

if ($c < 0x80) {

$str .= $c;

} elseif ($c < 0x800) {

$str .= chr(0xC0 | $c >> 6);

$str .= chr(0x80 | $c & 0x3F);

} elseif ($c < 0x10000) {

$str .= chr(0xE0 | $c >> 12);

$str .= chr(0x80 | $c >> 6 & 0x3F);

$str .= chr(0x80 | $c & 0x3F);

} elseif ($c < 0x200000) {

$str .= chr(0xF0 | $c >> 18);

$str .= chr(0x80 | $c >> 12 & 0x3F);

$str .= chr(0x80 | $c >> 6 & 0x3F);

$str .= chr(0x80 | $c & 0x3F);

}

return $str;

}

function GB2UTF8_SQL($strGB) {

if (!trim($strGB)) return $strGB;

$strRet = \"\";

$intLen = strlen($strGB);

for ($i = 0; $i < $intLen; $i++) {

if (ord($strGB{$i}) > 127) {

$strCurr = substr($strGB, $i, 2);

$intGB = hexdec(bin2hex($strCurr)) - 0x8080;

$strSql = \"SELECT code_unicode FROM nnstats_gb_unicode

WHERE code_gb = \".$intGB.\" LIMIT 1\"

;

$resResult = mysql_query($strSql);

if ($arrCode = mysql_fetch_array($resResult)) $strRet .= u2utf8($arrCode[\"code_unicode\"]);

else $strRet .= \"??\";

$i++;

} else {

$strRet .= $strGB{$i};

}

}

return $strRet;

}

function GB2UTF8_FILE($strGB) {

if (!trim($strGB)) return $strGB;

$arrLines = file(\"gb_unicode.txt\");

foreach ($arrLines as $strLine) {

$arrCodeTable[hexdec(substr($strLine, 0, 6))] = hexdec(substr($strLine, 7, 6));

}

$strRet = \"\";

$intLen = strlen($strGB);

for ($i = 0; $i < $intLen; $i++) {

if (ord($strGB{$i}) > 127) {

$strCurr = substr($strGB, $i, 2);

$intGB = hexdec(bin2hex($strCurr)) - 0x8080;

if ($arrCodeTable[$intGB]) $strRet .= u2utf8($arrCodeTable[$intGB]);

else $strRet .= \"??\";

$i++;

} else {

$strRet .= $strGB{$i};

}

}

return $strRet;

}

function EncodeIp($strDotquadIp) {

$arrIpSep = explode(\'.\', $strDotquadIp);

if (count($arrIpSep) != 4) return 0;

$intIp = 0;

foreach ($arrIpSep as $k => $v) $intIp += (int)$v * pow(256, 3 - $k);

return $intIp;

//return sprintf(\'%02x%02x%02x%02x\', $arrIpSep[0], $arrIpSep[1], $arrIpSep[2], $arrIpSep[3]);

}

function GetMicroTime() {

list($msec, $sec) = explode(\" \", microtime());

return ((double)$msec + (double)$sec);

}

for ($i = 0; $i < 100; $i++) { // 随机产生100个ip地址

$strIp = mt_rand(0, 255).\".\".mt_rand(0, 255).\".\".mt_rand(0, 255).\".\".mt_rand(0, 255);

$arrAddr[$i] = ip2addr(EncodeIp($strIp));

}

$resConn = mysql_connect(\"localhost\", \"netnest\", \"netnest\");

mysql_select_db(\"test\");

// 测评MySQL查询的编码转换

$dblTimeStart = GetMicroTime();

for ($i = 0; $i < 100; $i++) {

$strUTF8Region = GB2UTF8_SQL($arrAddr[$i][\"region\"]);

$strUTF8Address = GB2UTF8_SQL($arrAddr[$i][\"address\"]);

}

$dblTimeDuration = GetMicroTime() - $dblTimeStart;

// 测评结束并输出结果

echo $dblTimeDuration; echo \"\r\n\";

// 测评文本文件查询的编码转换

$dblTimeStart = GetMicroTime();

for ($i = 0; $i < 100; $i++) {

$strUTF8Region = GB2UTF8_FILE($arrAddr[$i][\"region\"]);

$strUTF8Address = GB2UTF8_FILE($arrAddr[$i][\"address\"]);

}

$dblTimeDuration = GetMicroTime() - $dblTimeStart;

// 测评结束并输出结果

echo $dblTimeDuration; echo \"\r\n\";

?>