PHP数据库备份脚本技巧

代码如下：

// 备份数据库

$host = "localhost";

$user = "root"; //数据库账号

$password = ""; //数据库密码

$dbname = "mysql"; //数据库名称

// 这里的.账号、密码、名称都是从页面传过来的

if (!mysql_connect($host, $user, $password)) // 连接mysql数据库

{

echo 数据库连接失败，请核对后再试;

exit;

}

if (!mysql_select_db($dbname)) // 是否存在该数据库

{

echo 不存在数据库: . $dbname . ,请核对后再试;

exit;

}

mysql_query("set names utf8");

$mysql = "set charset utf8; ";

$q1 = mysql_query("show tables");

while ($t = mysql_fetch_array($q1))

{

$table = $t[0];

$q2 = mysql_query("show create table `$table`");

$sql = mysql_fetch_array($q2);

$mysql .= $sql[Create Table] . "; ";

$q3 = mysql_query("select * from `$table`");

while ($data = mysql_fetch_assoc($q3))

{

$keys = array_keys($data);

$keys = array_map(addslashes, $keys);

$keys = join(`,`, $keys);

$keys = "`" . $keys . "`";

$vals = array_values($data);

$vals = array_map(addslashes, $vals);

$vals = join(",", $vals);

$vals = "" . $vals . "";

$mysql .= " into `$table`($keys) values($vals); ";

}

}

$filename = $dbname . date(Ymjgi) . ""; //存放路径，默认存放到项目最外层

$fp = fopen($filename, w);

fputs($fp, $mysql);

fclose($fp);

echo "数据备份成功";

?>