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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2009 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
namespace Org\Util;
class CodeSwitch
{
// 错误信息
private static $error = array();
// 提示信息
private static $info = array();
// 记录错误
private static function error($msg)
{
self::$error[] = $msg;
}
// 记录信息
private static function info($info)
{
self::$info[] = $info;
}
/**
* 编码转换函数,对整个文件进行编码转换
* 支持以下转换
* GB2312、UTF-8 WITH BOM转换为UTF-8
* UTF-8、UTF-8 WITH BOM转换为GB2312
* @access public
* @param string $filename 文件名
* @param string $out_charset 转换后的文件编码,与iconv使用的参数一致
* @return void
*/
public static function DetectAndSwitch($filename, $out_charset)
{
$fpr = fopen($filename, "r");
$char1 = fread($fpr, 1);
$char2 = fread($fpr, 1);
$char3 = fread($fpr, 1);
$originEncoding = "";
if (chr(239) == $char1 && chr(187) == $char2 && chr(191) == $char3) //UTF-8 WITH BOM
{
$originEncoding = "UTF-8 WITH BOM";
} elseif (chr(255) == $char1 && chr(254) == $char2) //UNICODE LE
{
self::error("不支持从UNICODE LE转换到UTF-8或GB编码");
fclose($fpr);
return;
} elseif (chr(254) == $char1 && chr(255) == $char2) {
//UNICODE BE
self::error("不支持从UNICODE BE转换到UTF-8或GB编码");
fclose($fpr);
return;
} else {
//没有文件头,可能是GB或UTF-8
if (rewind($fpr) === false) { //回到文件开始部分,准备逐字节读取判断编码
self::error($filename . "文件指针后移失败");
fclose($fpr);
return;
}
while (!feof($fpr)) {
$char = fread($fpr, 1);
//对于英文,GB和UTF-8都是单字节的ASCII码小于128的值
if (ord($char) < 128) {
continue;
}
//对于汉字GB编码第一个字节是110*****第二个字节是10******(有特例,比如联字)
//UTF-8编码第一个字节是1110****第二个字节是10******第三个字节是10******
//按位与出来结果要跟上面非星号相同,所以应该先判断UTF-8
//因为使用GB的掩码按位与,UTF-8的111得出来的也是110,所以要先判断UTF-8
if ((ord($char) & 224) == 224) {
//第一个字节判断通过
$char = fread($fpr, 1);
if ((ord($char) & 128) == 128) {
//第二个字节判断通过
$char = fread($fpr, 1);
if ((ord($char) & 128) == 128) {
$originEncoding = "UTF-8";
break;
}
}
}
if ((ord($char) & 192) == 192) {
//第一个字节判断通过
$char = fread($fpr, 1);
if ((ord($char) & 128) == 128) {
//第二个字节判断通过
$originEncoding = "GB2312";
break;
}
}
}
}
if (strtoupper($out_charset) == $originEncoding) {
self::info("文件" . $filename . "转码检查完成,原始文件编码" . $originEncoding);
fclose($fpr);
} else {
//文件需要转码
$originContent = "";
if ("UTF-8 WITH BOM" == $originEncoding) {
//跳过三个字节,把后面的内容复制一遍得到utf-8的内容
fseek($fpr, 3);
$originContent = fread($fpr, filesize($filename) - 3);
fclose($fpr);
} elseif (rewind($fpr) != false) {
//不管是UTF-8还是GB2312,回到文件开始部分,读取内容
$originContent = fread($fpr, filesize($filename));
fclose($fpr);
} else {
self::error("文件编码不正确或指针后移失败");
fclose($fpr);
return;
}
//转码并保存文件
$content = iconv(str_replace(" WITH BOM", "", $originEncoding), strtoupper($out_charset), $originContent);
$fpw = fopen($filename, "w");
fwrite($fpw, $content);
fclose($fpw);
if ("" != $originEncoding) {
self::info("对文件" . $filename . "转码完成,原始文件编码" . $originEncoding . ",转换后文件编码" . strtoupper($out_charset));
} elseif ("" == $originEncoding) {
self::info("文件" . $filename . "中没有出现中文,但是可以断定不是带BOM的UTF-8编码,没有进行编码转换,不影响使用");
}
}
}
/**
* 目录遍历函数
* @access public
* @param string $path 要遍历的目录名
* @param string $mode 遍历模式,一般取FILES,这样只返回带路径的文件名
* @param array $file_types 文件后缀过滤数组
* @param int $maxdepth 遍历深度,-1表示遍历到最底层
* @return void
*/
public static function searchdir($path, $mode = "FULL", $file_types = array(".html", ".php"), $maxdepth = -1, $d = 0)
{
if (substr($path, strlen($path) - 1) != '/') {
$path .= '/';
}
$dirlist = array();
if ("FILES" != $mode) {
$dirlist[] = $path;
}
if ($handle = @opendir($path)) {
while (false !== ($file = readdir($handle))) {
if ('.' != $file && '..' != $file) {
$file = $path . $file;
if (!is_dir($file)) {
if ("DIRS" != $mode) {
$extension = "";
$extpos = strrpos($file, '.');
if (false !== $extpos) {
$extension = substr($file, $extpos, strlen($file) - $extpos);
}
$extension = strtolower($extension);
if (in_array($extension, $file_types)) {
$dirlist[] = $file;
}
}
} elseif ($d >= 0 && ($d < $maxdepth || $maxdepth < 0)) {
$result = self::searchdir($file . '/', $mode, $file_types, $maxdepth, $d + 1);
$dirlist = array_merge($dirlist, $result);
}
}
}
closedir($handle);
}
if (0 == $d) {
natcasesort($dirlist);
}
return ($dirlist);
}
/**
* 对整个项目目录中的PHP和HTML文件行进编码转换
* @access public
* @param string $app 要遍历的项目路径
* @param string $mode 遍历模式,一般取FILES,这样只返回带路径的文件名
* @param array $file_types 文件后缀过滤数组
* @return void
*/
public static function CodingSwitch($app = "./", $charset = 'UTF-8', $mode = "FILES", $file_types = array(".html", ".php"))
{
self::info("注意: 程序使用的文件编码检测算法可能对某些特殊字符不适用");
$filearr = self::searchdir($app, $mode, $file_types);
foreach ($filearr as $file) {
self::DetectAndSwitch($file, $charset);
}
}
public static function getError()
{
return self::$error;
}
public static function getInfo()
{
return self::$info;
}
}