backup_tables

< ?php 
backup_tables('localhost','root','xxxxxxx','dbname');

/* backup the db OR just a table 
$hostname 主機名稱
$username 帳號
$password 密碼
$dbname   資料庫名稱
*/

function backup_tables($hostname,$username,$password,$dbname,$tables = '*')
{
 
 $link = mysql_connect($hostname,$username,$password);
 mysql_select_db($dbname,$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
 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);
}
? >