title: Put dot between two variables in a string
body: <p>how can I put a dot between two variables in mysql?
  Something like this, but it doesn't work:</p>
  
  <pre><code>$query_filename-&gt;execute(array(".$value.".".$ext.", $key));
  </code></pre>
  
  <p>So the table would read (for example): file.txt</p>
  
  <p>Thank you!</p>