<?php
$dbhost = 'localhost';
$dbuser = 'root';
$dbpass = '';
$dbname = 'cwp';

function backup_tables($host,$user,$pass,$name,$tables = '*')
{

	$link = mysql_connect($host,$user,$pass);
	mysql_select_db($name,$link);
	mysql_query("SET NAMES 'utf8'");

	//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] = str_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);


	 $handle = fopen('rvg-db-backup-'.time().'-'.(md5(implode(',',$tables))).'.sql','w+');
     fwrite($handle,$return);
     fclose($handle);

     $filename = 'rvg-db-backup-'.time().'.sql';
     Header("Content-type: application/octet-stream");
     Header("Content-Disposition: attachment; filename=$filename");
     echo $return;

}

backup_tables($dbhost,$dbuser,$dbpass,$dbname);
?>