mysql 数据备份类代码
mysql 数据备份类代码 /*** * 说明,该类适用于小型的网站的数据库备份,内置MYSQL连接,只需要简单配置数据连接 * 及存贮备份的位置即可。 * 类中show_dir_file() 方法可直接返回备份目录下的所有文件,返回以数组形式
mysql教程 数据备份类代码
/***
* 说明,该类适用于小型的网站的数据库教程备份,内置mysql连接,只需要简单配置数据连接
* 及存贮备份的位置即可。
* 类中show_dir_file() 方法可直接返回备份目录下的所有文件,返回以数组形式
* 方法 expord_sql() 直接生成sql文件
* 该类制作简单,可任意传播,如何您对该类有什么提议,请发送邮件给小虾
* 制作人:游天小虾
* emial:328742379@qq.com
* **/
class data {
public $data_dir = "class/"; //备份文件存放的路径
public $data_name = "111cnnet.sql"; //备份文件名
private $mysql_host = "localhost"; //数据库地址
private $mysql_user = "root"; //用户名
private $mysql_pwd = "lpl19881129"; //密码
private $mysql_db = "date"; //数据库名
private $mysql_code = "gbk"; //编码方式
/***
* 1.连接数据库
* **/
function __construct(){
$conn = mysql_connect($this->mysql_host,$this->mysql_user,$this->mysql_pwd);
mysql_select_db($this->mysql_db);
mysql_query("set names $this->mysql_code");
}
/***
* 2.生成sql语句
* **/
private function set_sql($table){
$tabledump = "drop table if exists $table;n";
$createtable = mysql_query("show create table $table");
$create = mysql_fetch_row($createtable);
$tabledump .= $create[1].";nn";
$rows = mysql_query("select * from $table");
$numfields = mysql_num_fields($rows);
$numrows = mysql_num_rows($rows);
while ($row = mysql_fetch_row($rows)){
$comma = "";
$tabledump .= "insert into $table values(";
for($i = 0; $i
{
$tabledump .= $comma."'".mysql_escape_string($row[$i])."'";
$comma = ",";
}
$tabledump .= ");n";
}
$tabledump .= "n";
return $tabledump;
}
/***
* 3.显示存放目录下已经备份的文件
* **/
public function show_dir_file() {
$dir = $this->data_dir;
if(!is_dir($dir)){
if(!mkdir($dir)){
echo "文件夹不存在,尝试创建文件夹,创建失败,可能是您没有相关权限";
exit();
}else{
chmod($dir,755);
}
}
if(!is_writable($dir)){
echo " 文件不可写";
exit();
}
$link = opendir($dir);
if(!$link){
echo "创建链接失败";
exit();
}
return scandir($dir);
}
/***
* 4.生成sql文件
* **/
public function expord_sql(){
$this->show_dir_file();
$result = mysql_list_tables($this->mysql_db);
while($arr = mysql_fetch_row($result)){
$tables .= $this->set_sql($arr[0]);
}
$file = $this->data_dir.$this->data_name;
$link = fopen($file,"w+");
if(!is_writable($file)){
echo "文件不可写";
exit();
}
fwrite($link,$tables);
fclose($link);
echo "备份成功";
}
}

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