req_uri: /ntu-ocw/index.php/cou-file/103S113/103S113_AA01L01.pptx?preview=1 <br>dir - fn: 103S113 - 103S113_AA01L01.pptx <br>/var/www/html/ocw_files<br>fp: /var/www/html/ocw_files/103S113/103S113_AA01L01.pptx <br><pre>array(4) {
  ["dirname"]=>
  string(31) "/var/www/html/ocw_files/103S113"
  ["basename"]=>
  string(20) "103S113_AA01L01.pptx"
  ["extension"]=>
  string(4) "pptx"
  ["filename"]=>
  string(15) "103S113_AA01L01"
}
</pre>pv_fp: /var/www/html/ocw_preview/103S113/103S113_AA01L01.pptx.pdf <br>Conversion failed