/**
* 備份 ...
* @param $filename 文件路徑
*/
function beifen($filename) {
$this->db(); //連接數(shù)據(jù)庫

$sql=$this->sqlcreate();
$sql2=$this->sqlinsert();
$data=$sql.$sql2;

return file_put_contents($filename, $data);
}

/**
* 還原 ...
* @param $filename 文件路徑
*/
function huanyuan($filename) {
$this->db(); //連接數(shù)據(jù)庫

//刪除數(shù)據(jù)表
$list=$this->tblist();
$tb='';
foreach ($list as $v) {
$tb.="`$v`,";
}
$tb=mb_substr($tb, 0, -1);
if ($tb) {
$rs=mysql_query("DROP TABLE $tb");
if ($rs===false) {
return false;
}
}

//執(zhí)行SQL
$str=file_get_contents($filename);
$arr=explode('-- <xjx> --', $str);
array_pop($arr);

foreach ($arr as $v) {
$rs=mysql_query($v);
if ($rs===false) {
return false;
}
}

return true;
}

$x=new dbBackup();
$x->database='test';
$rs=$x->beifen('db.sql');
var_dump($rs);

$x=new dbBackup();
$x->database='test';
$rs=$x->huanyuan('db.sql');
var_dump($rs);

class dbBackup {
public $host='localhost'; //數(shù)據(jù)庫地址
public $user='root'; //登錄名
public $pwd=''; //密碼
public $database; //數(shù)據(jù)庫名
public $charset='utf8'; //數(shù)據(jù)庫連接編碼：mysql_set_charset

/**
* 備份 ...
* @param $filename 文件路徑
*/
function beifen($filename) {
$this->db(); //連接數(shù)據(jù)庫

$sql=$this->sqlcreate();
$sql2=$this->sqlinsert();
$data=$sql.$sql2;

return file_put_contents($filename, $data);
}

/**
* 還原 ...
* @param $filename 文件路徑
*/
function huanyuan($filename) {
$this->db(); //連接數(shù)據(jù)庫

//刪除數(shù)據(jù)表
$list=$this->tblist();
$tb='';
foreach ($list as $v) {
$tb.="`$v`,";
}
$tb=mb_substr($tb, 0, -1);
if ($tb) {
$rs=mysql_query("DROP TABLE $tb");
if ($rs===false) {
return false;
}
}

//執(zhí)行SQL
$str=file_get_contents($filename);
$arr=explode('-- <xjx> --', $str);
array_pop($arr);

foreach ($arr as $v) {
$rs=mysql_query($v);
if ($rs===false) {
return false;
}
}

return true;
}

/**
* 連接數(shù)據(jù)庫 ...
*/
function db() {
$con = mysql_connect($this->host,$this->user,$this->pwd);
if (!$con){
die('Could not connect');
}

$db_selected = mysql_select_db($this->database, $con);
if (!$db_selected) {
die('Can\'t use select db');
}

mysql_set_charset($this->charset); //設(shè)置編碼

return $con;
}

/**
* 表集合 ...
*/
function tblist() {
$list=array();

$rs=mysql_query("SHOW TABLES FROM $this->database");
while ($temp=mysql_fetch_row($rs)) {
$list[]=$temp[0];
}

return $list;
}

/**
* 表結(jié)構(gòu)SQL ...
*/
function sqlcreate() {
$sql='';

$tb=$this->tblist();
foreach ($tb as $v) {
$rs=mysql_query("SHOW CREATE TABLE $v");
$temp=mysql_fetch_row($rs);
$sql.="-- 表的結(jié)構(gòu)：{$temp[0]} --\r\n";
$sql.="{$temp[1]}";
$sql.=";-- <xjx> --\r\n\r\n";
}
return $sql;
}

/**
* 數(shù)據(jù)插入SQL ...
*/
function sqlinsert() {
$sql='';

$tb=$this->tblist();
foreach ($tb as $v) {
$rs=mysql_query("SELECT * FROM $v");
if (!mysql_num_rows($rs)) {//無數(shù)據(jù)返回
continue;
}
$sql.="-- 表的數(shù)據(jù)：$v --\r\n";
$sql.="INSERT INTO `$v` VALUES\r\n";
while ($temp=mysql_fetch_row($rs)) {
$sql.='(';
foreach ($temp as $v2) {
if ($v2===null) {
$sql.="NULL,";
}
else {
$v2=mysql_real_escape_string($v2);
$sql.="'$v2',";
}
}
$sql=mb_substr($sql, 0, -1);
$sql.="),\r\n";
}
$sql=mb_substr($sql, 0, -3);
$sql.=";-- <xjx> --\r\n\r\n";
}

return $sql;
}
}
//備份
//$x=new dbBackup();
//$x->database='test';
//$rs=$x->beifen('db.sql');
//var_dump($rs);
//還原
//$x=new dbBackup();
//$x->database='test';
//$rs=$x->huanyuan('db.sql');
//var_dump($rs);