Working with MySQL version 5.0.32 and PHP version 5.2.0 on Debian Etch.

Script is designed to run from command line “php optimize.php” maybe from a cron job. Be careful: avoid running this script during your server “rush hour”, it may slow down your server.

<?php
/***********************************************************
 optimimze.php - optimizes all databases and tables of the
                 given mysql host.

 2008 - technitip.net
 ***********************************************************/

$mysqlhost = "localhost"; // enter MySQL host
$mysqluser = "user";      // enter MySQL user
$mysqlpwd  = "password";  // enter password

###########################################

$connection = mysql_connect($mysqlhost, $mysqluser, $mysqlpwd);
if (mysql_error())
{
  echo "Could not connect to database server! " . mysql_error() . "\n";
  exit;
}

$db_list = mysql_list_dbs();
$i = 0;
$cnt = mysql_num_rows($db_list);

while ($i < $cnt)
{
  $db = mysql_db_name($db_list, $i);
  ###########################################
  mysql_select_db($db, $connection);
  $result = mysql_list_tables($db);

  while ($row = mysql_fetch_row($result))
  {
    if ( $db == "information_schema" )
      continue;

    echo $db . " : `" . $row[0] . "`";

    $sql = "OPTIMIZE TABLE `".$row[0]."`";
    $erg = mysql_query($sql, $connection) or die(mysql_error());
    $data= mysql_fetch_array($erg, MYSQL_ASSOC);

    if($data)
    {
      echo " - " . $data['Msg_text'] . "\n";
    }
  }
  ###########################################
  $i++;
}

?>

This script is intended to be called periodically (e.g. every day) from cron:

2 2       * * *   root /root/scripts/mysql_backup.sh

#/bin/sh
now=`date "+%Y-%m-%d"`
user="mysql_user"
password="mysql_password"
path="/home/backup/"

cd $path

mysqldump -u $user -p$password  --all-databases | gzip -c > backup_all_$now.sql.gz

# delete files older than 3 days
find . -name "*.gz" -type f -mtime +3 -exec rm {} ";"