Drupal Modules missing on new install and on existing sites. Please help

I was running my dev sites from siteground hosting, and had another account with cirtex hosting, so when I tried installing on cirtex it all worked. I haven't changed anything on my siteground hosting but it still give me this error. Any help would be great.

Hi everyone, I wonder if any of you has managed to fix this problem on Siteground (or other hosts if having same issue) yet. If so, please don't forget to post your solution here.

It would be nice if someone from the drupal support folks can give us their thoughts on this.

-- thanks

In fact I too had this problem and I got it sorted out. This happens because of the server php installation. PHP 5.0.5 causes this problem, please ask your hosting company to upgrade it to PHP 5.1.6 and you will see everything working fine. Thanks to my hosting company for such a quick response.

http://me.googling.in/2007/04/09/modules-invisible-shown-missing-in-drup...

Kishore Asokan

I had almost the same problem. The comment module was missing. After removing the phpbb2drupal module (made for drupal <=4.7) the comment module was back.

I have the same problem. I can not install Drupal, it says that almost all modules are missing.
And this is not just installation problem. It also affects any modules and themes that you upload to server. Drupal does not "see" more than half of them.

In my case server has php version 5.2.1.

Any ideas?

I have the same problem with attempts to install Drupal 5.0 or 5.1 on my PHP 5.2.1 CentOS server.

Copying or moving the modules to sites/all/modules does not help.

I've tracked the problem down to one line in the file_scan_directory in includes/file.inc :

while ($file = readdir($handle)) {

readdir succeeds for the first n modules (where n is something like 7 or 8) and then consistently returns false after that, no matter what is in the module directories.

Very strange because I have what appears to be exactly the same function and line in a 4.* installation on the same machine and it works just fine.

I have just, just upgraded a working 5.1 site to 5.2 and the "Comment" module is missing.

Reading through the above posts, it's a bit "rich" saying this is a "server issue".

Same server, same site, new code = something is broken

I also run about 5 other Drupal sites using 4.6, 4.7 5.1 and AFAIK the comment module seems to work fine there.
I have a standard layout for the locations of my installation with core modules in /comment and add-on modules in /sites/all/modules
Optional modules (sites/all/modules) are displaying as are the optional core modules with the exception of comments.

Hosting co = Bluehost
PHP version = 4.4.6
Linux AFAIK = Red Hat
Kernel version = 2.6.21-3_1.BHsmp

Any suggestions?

Casper Labuschagne
Where am I on the Drupal map on Frapper?

Same here
I used to have a 5.1 installation, and many modules were missing, like taxonomy and comment.
then i started moving them to sites/all/modules and they appeared

but i know some modules are still missing.

I have upgraded to 5.2, same issue

Yesterday i have installed the feedback module and the archive module in the above folder, and tinyMCE is gone but still works.
I have then moved those modules to the standard folder, they keep on not working, and tinyMCE is still gone...

this is nonsense.

My host is Electric Kitten
MySQL 4.1.21-standard
PHP 4.4.6

Recently I moved a site to a host and noticed this same problem.

The host is running 4.7 and 5.x sites fine.

The sites was a 4.7 install that was upgraded to 5.1 on old host. It has many junk/old modules in its modules dir.

I tried an upgrade to 5.2 once it was on the new host but that did not work. I tried cleaning the old modules. I even tried removing them. None worked.

I did a clean 5.2 install. Enabled all modules that came with it. Pointed the new install to the old DB and voila. All works and modules are still visible.

So, I dare to say. It does not look like a PHP version issue.

I hope this helps someone.

Serving None.

In order to make it work for any version of php(4, 5) I rearange the order of executions in file_scan_directory in file.inc under indludes folder like this:

function file_scan_directory($dir, $mask, $nomask = array('.', '..', 'CVS'), $callback = 0, $recurse = TRUE, $key = 'filename', $min_depth = 0, $depth = 0) {
$key = (in_array($key, array('filename', 'basename', 'name')) ? $key : 'filename');
$files = array();

$file_array=array();
if (is_dir($dir) && $handle = opendir($dir)) {
while (false !== ($file = readdir($handle))) {
$file_array[] = $file;
}
closedir($handle);
}

if( count($file_array) >0){

foreach( $file_array as $file){
if (!in_array($file, $nomask) && $file[0] != '.') {
if (is_dir("$dir/$file") && $recurse) {
$files = array_merge($files, file_scan_directory("$dir/$file", $mask, $nomask, $callback, $recurse, $key, $min_depth, $depth + 1));
}
elseif ($depth >= $min_depth && ereg($mask, $file)) {
$filename = "$dir/$file";
$basename = basename($file);
$name = substr($basename, 0, strrpos($basename, '.'));
$files[$$key] = new stdClass();
$files[$$key]->filename = $filename;
$files[$$key]->basename = $basename;
$files[$$key]->name = $name;
if ($callback) {
$callback($filename);
}
}
}
}
}

return $files;
}

i found some duplicate modules in the root module folder. i deleted these and problem solved.

I have two Drupal installs on my servers (Direct access. They are in the next room.) Drupal 5.7 running on PHP 5.0.4.

One is a multi-site setup I use for hosting, and the other is a site under development for a client which I will migrate to another provider when done. Both installs have been working fine, and are independent. If it were a server problem, one would expect both installs to behave the same. It is not a server problem!

Yesterday, the Comments module disappeared from the multi-site install (from ALL hosted sites). I corrected the problem by moving the module to sites/all/modules, but it does not give me a warm fuzzy feeling that any module might drop from the list and become unavailable without warning.

We don't need a 'this worked for me' type of fix. We need to know why this is happening, and how to correct the problem.

I met the same problem today. I have Drupal 5.7 installed. I removed all the modules in sites/all first, and tried to put modules back one by one and see if there's any of them conflict with the core Comments. And I found OG Comments made the core Comments appear missing. Then I read the "Read Me" in the OG Comments. It seems there's some patches required to make it work. I haven't tried it yet. But for now, I just removed that module, in order to make my Drupal back to function right.

I don't know if this helps?