有些問題，不能重復轉，比如gbk轉到utf8,然後有在轉成utf8,這樣會亂碼，我本來試圖在轉換之前去檢測編碼的，貌似失敗了。我特意試了一個文件，我檢測它是是否是gbk或者是utf-8,都返回true。這就不懂了。
復制代碼 代碼如下:
<?php
/**
* 轉換文件編碼
* 依賴的擴展filesystem 和 mbstring
* @example
* <pre>
* include_once 'ConvertEncode.php';
* $convert = new ConvertEncode();
* try{
* $convert->setPath('my', true, true);//目錄
* //$convert->setPath('my.php');//單文件
* $convert->setEncode('GBK', 'UTF-8');
* $convert->convert();
* }catch(ConvertException $e) {
* echo $e->getMessage();
* }
* </pre>
*/
class ConvertEncode {
/**
* 要轉換成的編碼
* @var string
*/
private $_to_encoding;
/**
* 轉換前的編碼
* @var string
*/
private $_from_encoding;
/**
* 要轉換的的目錄或者單文件
* @var string
*/
private $_path;
/**
* 是否是一個目錄，當給出的是目錄是才設置
* @var boolean
*/
private $_directory;
/**
* 是否遞歸遍歷，僅對目錄有效
* @var boolean
*/
private $_recursion;
/**
* 保存所有待轉換的文件，僅當轉換目錄裡面的文件時才用
* @var array
*/
private $_files = array();
/**
* 構造函數
*/
public function __construct() {
if( ! function_exists('mb_convert_encoding') ) {
throw new ConvertException('mbstring extension be required');
}
}
/**
* 設置需要轉換的目錄或者單文件
* @param string $path 目錄或者文件
* @param boolean 是否是目錄
* @param boolean 是否遞歸目錄
* @return boolean
*/
public function setPath($path, $is_dir = false, $rec = false) {
$this->_path = $path;
$this->_directory = $is_dir;
$this->_recursion = $rec;
return true;
}
/**
* 設置轉換前的編碼和要轉換到的編碼
* @param string $encode 轉換前的編碼
* @param string $encode 轉換到的編碼
* @return boolean
*/
public function setEncode($encode_from, $encode_to) {
$this->_from_encoding = $encode_from;
$this->_to_encoding = $encode_to;
return true;
}
/**
* 轉換編碼，根據是否是目錄的設置分別轉換
* @return boolean
*/
public function convert() {
if($this->_directory ) {
return $this->_convertDirectory();
}
return $this->_convertFile();
}
/**
* 轉換文件
* @throws ConvertException
* @return boolean
*/
private function _convertFile() {
if( ! file_exists($this->_path) ) {
$message = $this->_path . ' does not exist.';
throw new ConvertException($message);
}
if( ! is_file($this->_path) ) {
$message = $this->_path . ' is not a file.';
throw new ConvertException($message);
}
if( ! $this->_isWR() ) {
$message = $this->_path . ' must can be read and write.';
throw new ConvertException($message);
}
$file_real_path = realpath($this->_path);
$file_content_from = file_get_contents( $file_real_path );
if( mb_check_encoding($file_content_from, $this->_from_encoding) ) {
$file_content_to = mb_convert_encoding( $file_content_from, $this->_to_encoding, $this->_from_encoding );
file_put_contents( $file_real_path, $file_content_to );
}
return true;
}
/**
* 轉換目錄
* @throws ConvertException
* @return boolean
*/
private function _convertDirectory() {
if( ! file_exists($this->_path) ) {
$message = $this->_path . ' does not exist.';
throw new ConvertException($message);
}
if( ! is_dir($this->_path) ) {
$message = $this->_path . ' is not a directory.';
throw new ConvertException($message);
}
if( ! $this->_isWR() ) {
$message = $this->_path . ' must can be read and write.';
throw new ConvertException($message);
}
$this->_scanDirFiles();
if( empty($this->_files) ) {
$message = $this->_path . ' is a empty directory.';
throw new ConvertException($message);
}
foreach( $this->_files as $value ) {
$file_content_from = file_get_contents( $value );
if( mb_check_encoding($file_content_from, $this->_from_encoding) ) {
$file_content_to = mb_convert_encoding( $file_content_from, $this->_to_encoding, $this->_from_encoding );
file_put_contents( $value, $file_content_to );
}
}
return true;
}
/**
* 判斷文件或者目錄是否可讀寫
* @return boolean 可讀寫時返回true,否則返回false
*/
private function _isWR() {
if( is_readable($this->_path) && is_writable($this->_path) ) {
return true;
}
return false;
}
/**
* 遍歷目錄，找出所有文件，加上絕對路徑
* @return boolean
*/
private function _scanDirFiles($dir = '') {
$base_path = empty( $dir ) ? realpath($this->_path) . DIRECTORY_SEPARATOR : realpath($dir) . DIRECTORY_SEPARATOR;
$files_tmp = empty( $dir ) ? scandir($this->_path) : scandir($dir);
foreach( $files_tmp as $value ) {
if( $value == '.' || $value == '..' || ( strpos($value, '.') === 0 ) ) {
continue;
}
$value = $base_path . $value;
if( is_dir($value) ) {
if( $this->_recursion ) {
$this->_scanDirFiles($value);
}
}
elseif( is_file($value) ) {
$this->_files[] = $value;
}
}
return true;
}
}
/**
* 轉換異常
*
*/
class ConvertException extends Exception {
}
