MysqL_connect($host,$user,$password);
MysqL_select_db($dbname);
$MysqL= "set names utf8;";
MysqL_query($MysqL);
$q1=MysqL_query("show tables");
while($t=MysqL_fetch_array($q1)){
$table=$t[0];
$q2=MysqL_query("show create table `$table`");
$sql=MysqL_fetch_array($q2);
$MysqL.=$sql['Create Table'].";\n";

$q3=MysqL_query("select * from `$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."'";
$MysqL.="insert into `$table`($keys) values($vals);\n";
}
$MysqL.="\n";
}
$filename=$dbname.date('Ymj').".sql";
$fp = fopen($filename,'w');
fputs($fp,$MysqL);
fclose($fp);
echo "数据备份成功,生成备份文件".$filename;
?>

/* backup the db OR just a table */
function backup_tables($host,$pass,$name,$tables = '*')
{ $link = MysqL_connect($host,$pass);
MysqL_select_db($name,$link); //get all of the tables
if($tables == '*')
{
$tables = array();
$result = MysqL_query('SHOW TABLES');
while($row = MysqL_fetch_row($result))
{
$tables[] = $row[0];
}
}
else
{
$tables = is_array($tables) ? $tables : explode(',',$tables);
}
$return = '';
//cycle through
foreach($tables as $table)
{
$result = MysqL_query('SELECT * FROM '.$table);
$num_fields = MysqL_num_fields($result);
$return.= 'DROP TABLE '.$table.';';
$row2 = MysqL_fetch_row(MysqL_query('SHOW CREATE TABLE '.$table));
$return.= "\n\n".$row2[1].";\n\n"; for ($i = 0; $i < $num_fields; $i++)
{
while($row = MysqL_fetch_row($result))
{
$return.= 'INSERT INTO '.$table.' VALUES(';
for($j=0; $j<$num_fields; $j++)
{
$row[$j] = addslashes($row[$j]);
$row[$j] = ereg_replace("\n","\\n",$row[$j]);
if (isset($row[$j])) { $return.= '"'.$row[$j].'"' ; } else { $return.= '""'; }
if ($j<($num_fields-1)) { $return.= ','; }
}
$return.= ");\n";
}
}
$return.="\n\n\n";
} //save file
$handle = fopen('db-backup-'.time().'-'.(md5(implode(',$tables))).'.sql','w+');
fwrite($handle,$return);
fclose($handle);
}
?>