title: Underscore as key in redis
body: <p>When key in redis contain a underscore hmget and hmset are not working anymore
  i think redis do not support underscore in key name.</p>
  <p>Is there a solution for this when rebuilding a complete database is impossible.</p>
  <pre><code>$values = array('value1'=&gt; 1, 'value2'=&gt; 'hello', 'value_three'=&gt; 'this is value 3');
  </code></pre>
  <p>$redis-&gt;hmset('key1', $values);</p>
  <p>$redis-&gt;hset('key1', 'value_three', 'this is my new value 3');</p>