列出目录/解压缩文件扩展名中的文件的问题

Question

I'm attempting to list only jpg files in a directory. There's over 200, but using the code below, only about 100 get listed. I've tried different variations for extracting the file extension, but this has been the only one that's worked: $sub = substr($file, -3);

Can anyone tell me why all of the files are not showing up?

Complete source:

<?php
  require('index.inc');
  $page = new buildpage();
  $page->buildHeader();

   $currentdir = '/home/tim/Documents/Web/';
   $dir = opendir($currentdir);
   echo "<ol>";
   while ($file = readdir($dir)){
      $file = readdir($dir);
      $sub = substr($file, -3);
      $ext = "jpg";
      if (strcasecmp($sub, $ext) == 0) {   
           echo "<li>$file</li>";
      }
   }
   echo "</ol>";
?>

Answer 1

You have

$file = readdir($dir)

twice in there. So its read twice everytime.Thus 200 becoming 100. Take out the second one and it should work.