title: convert three variable data into a date format in php
body: <p>i have three variables containing values shown below</p>
  
  <pre><code>                       $day=13
                         $month=2
                         $year=2013
  </code></pre>
  
  <p>i want to convert these three variable data into a date format in php and store in anoother variable
  Ho to do this??</p>