用PHP备份数据库

set_time_limit(36000);
$orders = 6; //目标表序号
// $dbNames = array("seeditbbs","seedblog"); //备份多库
$con = mysql_connect("localhost","root","root"); //h67g4n9s8l
mysql_select_db("ucenter",$con);
$rs = mysql_query("SHOW GLOBAL VARIABLES"); //读取MYSQL系统变量
   while($row = mysql_fetch_row($rs)){     if($row[0]=="datadir"){
$dataDir = $row[1]; //得到MYSQL的DATA目录
mysql_free_result($rs);
break;}
}
//foreach($dbNames as $dbName){ //循环备份多库   
$fromDir = $dataDir."ucenter";
$toDir = "d:/xampp/htdocs/ucenter/"; //目标目录
///if(!is_dir($toDir))
    //mkdir($toDir ); //建保存目录
    $fromDir .= "{$dbName}/"; //源目录

   $dirArr = scandir($fromDir);
foreach($dirArr as $subFile){ //拷备所有表文件

if())
   
   echo "
";
   echo $subFile;
   echo "
";

   echo $toDir;
   echo "
";

   echo $subFile;
  
   @copy($fromDir.$subFile,$toDir.$subFile);
     }

//}
($orders<9) ? $orders++ : $orders=1; //表序号自增,一日9次,备份时间: 1 8 10 12 14 16 18 20 22
$file = file_get_contents($_SERVER["SCRIPT_FILENAME"]);
$file = preg_replace("|\\\$orders \= \d+|","\$orders = $orders",$file); //修改本文件目标表序号
   file_put_contents($_SERVER["SCRIPT_FILENAME"],$file); //保存
?>