php实现mysql数据库备份类

               . $tableName.DIRECTORY_SEPARATOR    
               . $tableName.'.sql';    
$this->_TableBak->restoreTable($tableName,$tableBakFile);    
}    
}    

function _restoreOneTable($dbName,$tableName)    
{    
//step1:检查是否存在数据表:    
!in_array($tableName,$this->_getTableList($dbName)) && die("指定的表名<b>$tableName</b>在数据库中不存在");    
//step2:检查是否存在数据表备份文件 以及是否可写：    
$tableBakFile = $this->_dataDir.DIRECTORY_SEPARATOR    
         . $dbName.DIRECTORY_SEPARATOR    
      . $tableName.DIRECTORY_SEPARATOR    
         . $tableName.'.sql';    
!is_writeable ($tableBakFile) && die("$tableBakFile not exists or unwirteable");    
//step3:start restore    
$this->_TableBak->restoreTable($tableName,$tableBakFile);    
}    
function _restoreSomeTalbe($dbName,$TableNameList)    
{    
//step1:检查是否存在数据表:    
foreach ($TableNameList as $tableName){    
!in_array($tableName,$this->_getTableList($dbName)) && die("指定的表名<b>$tableName</b>在数据库中不存在");    
}    
//step2:检查是否存在数据表备份文件 以及是否可写：    
foreach ($TableNameList as $tableName){    
$tableBakFile = $this->_dataDir.DIRECTORY_SEPARATOR    
               . $dbName.DIRECTORY_SEPARATOR    
               . $tableName.DIRECTORY_SEPARATOR    
               . $tableName.'.sql';    
!is_writeable ($tableBakFile) && die("$tableBakFile not exists or unwirteable");    
}    
//step3:start restore: