PHP:open and read directory, which contains pdf files - php

Question

Am creating pdf files with TCPDF.Every single user gets a different folder.
This is a path name: $_SERVER['DOCUMENT_ROOT'].'/bandymas/pdfDocuments/'.$_SESSION["userSession"].There are no problem with file creation.
Now i need to see a list of created files and make them available for open.
The problem is, my page is crashing and I can't see the list.
$dir='/'.$_SERVER['DOCUMENT_ROOT'].'/bandymas/pdfDocuments/'.$_SESSION['userSession'].'/';
if(is_dir($dir)){
if($dh=opendir($dir)){
echo "My documents list:";
while(($fileName=readdir($dir)) !==false){
echo " view","\n";
}
close($dh);
}
}

Answer 1

The issue here is that line: while(($fileName=readdir($dir)) !==false)
A simple look into the php documentation of that function points out the reason why things fail:
string readdir ([ resource $dir_handle ] ) requries a directory handle as argument, not a file system path. So the line should be: while(($fileName=readdir($dh)) !==false). $dh is the variable holding your directory handle you got returned a few lines above when opening the folder.
This is a very common and typical issues with scripts getting implemented. We all make such mistakes. Nothing to worry about. But what you should learn from this is: monitor your http servers error log file. Such issues are pointed out in there, you can actually read in there what issue you are dealing with and typically also in which precise line in what file that issue occurs. You cannot seriously develop php without monitoring that error log file.

Answer 2

Use Code Below Working Just Fine.
$dir='/'.$_SERVER['DOCUMENT_ROOT'].'/bandymas/pdfDocuments/'.$_SESSION['userSession'].'/';
if (is_dir($dir)){
if ($dh = opendir($dir)) {
while (($file = readdir($dh)) !== false) {
echo "filename: $file : filetype: " . filetype($dir . $file) . "\n";
}
closedir($dh);
}
}
You used close($dh) instead of closedir($dh)