<slide title="Problem Solving Exercise">
<break />
<example title="How About this?" result="1"><![CDATA[<?php
  $cnt_file = '/tmp/'.basename(__FILE__).'.cnt';;
  $fp = fopen($cnt_file, 'a');
  fwrite($fp,'.');
  fclose($fp);
  $num = filesize($cnt_file);
  echo "File has been accessed $num times";
?>]]></example>
</slide>
