Question

Just playing around with memcache for the first time; here’s my code:

    $memcache = new Memcache();
    $memcache->connect('127.0.0.1', 11211) or die('Memcache connection error');

    // set the key then check the cache
    $key = md5(' SELECT * FROM `users` ');
    $get_result = $memcache->get($key);

    if($get_result) {
        echo "Data Pulled From Cache";
        var_dump($get_result);
    }
    else {
        $query = ' SELECT * FROM `users` ';
        $result = mysql_query($query);
        $row = mysql_fetch_assoc($result);
        $memcache->set($key, $row, TRUE, 20); // stored for 20 seconds

        echo "Data Pulled from the Database";
        var_dump($row);
    }

I have 50,000 dummy users in my users table, how come the var dump only shows the 1st user? As you can see there are no limit clauses in the query.

Answer 1

You’re only fetching one row from the $result resource. If you want a full rowset, you need to fetch each row in a while loop and append them onto an array:

  $rowset = array();
  while($row = mysql_fetch_assoc($result)) {
    // Fetch all rows in loop, appending each onto $rowset
    $rowset[] = $row;
  }
  // Store $rowset into memcache
  $memcache->set($key, $rowset, TRUE, 20); // stored for 20 seconds