Backup of all database

Hi,

Here is the code for taking backup of all database and their tables as sql file.


$link = mysql_connect('hostname','username','password');
$resultdb=mysql_query("show databases");
while($rowdb = mysql_fetch_row($resultdb))
{
mkdir("/var/www/html/dbbackup_".date('d_m_Y'),0777);
chdir("/var/www/html/dbbackup_".date('d_m_Y'));
backup_tables('hostname','username','password',$rowdb[0]);
}

echo "Database Backup is Created";

function backup_tables($host,$user,$pass,$name,$tables = '*')
{
$link = mysql_connect($host,$user,$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);
}
//cycle through
$return.="SET FOREIGN_KEY_CHECKS=0;\n";
foreach($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";
}
$return.="SET FOREIGN_KEY_CHECKS=1;\n";
//save file
$handle = fopen($name.'_'.date('d_m_Y').'.sql','w+');
fwrite($handle,$return);
fclose($handle);
}