請求來解答

請求高手進來解答，線上等

PHP code

class Smarty_Internal_Write_File {    /**     * Writes file in a save way to disk     *      * @param string $_filepath complete filepath     * @param string $_contents file content     * @return boolean true     */    public static function writeFile($_filepath, $_contents, $smarty)    {        $old_umask = umask(0);        $_dirpath = dirname($_filepath);         // if subdirs, create dir structure        if ($_dirpath !== '.' && !file_exists($_dirpath)) {            mkdir($_dirpath, $smarty->_dir_perms, true);        }         // write to tmp file, then move to overt file lock race condition        $_tmp_file = tempnam($_dirpath, 'wrt');        if (!($fd = @fopen($_tmp_file, 'wb'))) {            $_tmp_file = $_dirpath . DS . uniqid('wrt');            if (!($fd = @fopen($_tmp_file, 'wb'))) {            throw new SmartyException("unable to write file {$_tmp_file}");            return false;            }            }        fwrite($fd, $_contents);        fclose($fd);        // remove original file        if (file_exists($_filepath))            @unlink($_filepath);         // rename tmp file        rename($_tmp_file, $_filepath);         // set file permissions        chmod($_filepath, $smarty->_file_perms);        umask($old_umask);        return true;    } } 

詳細點翻譯下這段代碼是什麼意思，緊急用，線上等

------解決方案--------------------
class Smarty_Internal_Write_File {
/**
* Writes file in a save way to disk
*
* @param string $_filepath complete filepath
* @param string $_contents file content
* @return boolean true
*/
public static function writeFile($_filepath, $_contents, $smarty)
{
$old_umask = umask(0);
$_dirpath = dirname($_filepath); //$_filepath的路徑
// if subdirs, create dir structure
if ($_dirpath !== '.' && !file_exists($_dirpath)) {//路徑（檔案夾）不存在
mkdir($_dirpath, $smarty->_dir_perms, true);//建立
}
// write to tmp file, then move to overt file lock race condition
$_tmp_file = tempnam($_dirpath, 'wrt');//tempnam應該是轉換路徑到配置的模板轉換儲存目錄，就是smarty模板檔案轉換成php代碼檔案的檔案存放的位置

if (!($fd = @fopen($_tmp_file, 'wb'))) {//檢查目錄是否可以操作
$_tmp_file = $_dirpath . DS . uniqid('wrt');//轉換檔名
if (!($fd = @fopen($_tmp_file, 'wb'))) {
throw new SmartyException("unable to write file {$_tmp_file}");
return false;
}
}

fwrite($fd, $_contents);//寫轉換後的內容，就是把smarty代碼轉換成php代碼，
fclose($fd);

// remove original file
if (file_exists($_filepath))
@unlink($_filepath);
// rename tmp file
rename($_tmp_file, $_filepath);
// set file permissions
chmod($_filepath, $smarty->_file_perms);
umask($old_umask);
return true;
}
}

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