Get the latest file addition in a directory

$dir = "/path/to/Your/dir";         
$pattern = '\.(zip|ZIP|pdf|PDF)$'; // check only file with these ext.          
$newstamp = 0;            
$newname = "";

if ($handle = opendir($dir)) {               
       while (false !== ($fname = readdir($handle)))  {            
         // Eliminate current directory, parent directory            
         if (ereg('^\.{1,2}$',$fname)) continue;            
         // Eliminate other pages not in pattern            
         if (! ereg($pattern,$fname)) continue;            
         $timedat = filemtime("$dir/$fname");            
         if ($timedat > $newstamp) {
            $newstamp = $timedat;
            $newname = $fname;
          }
         }
        }
closedir ($handle);

// $newstamp is the time for the latest file
// $newname is the name of the latest file
// print last mod.file - format date as you like            
print $newname . " - " . date( "Y/m/d", $newstamp); 

$path = "/path/to/my/dir"; 

$latest_ctime = 0;
$latest_filename = '';    

$d = dir($path);
while (false !== ($entry = $d->read())) {
  $filepath = "{$path}/{$entry}";
  // could do also other checks than just checking whether the entry is a file
  if (is_file($filepath) && filectime($filepath) > $latest_ctime) {
    $latest_ctime = filectime($filepath);
    $latest_filename = $entry;
  }
}

// now $latest_filename contains the filename of the file that changed last

$dir = dirname(__FILE__).DIRECTORY_SEPARATOR;
$lastMod = 0;
$lastModFile = '';
foreach (scandir($dir) as $entry) {
    if (is_file($dir.$entry) && filectime($dir.$entry) > $lastMod) {
        $lastMod = filectime($dir.$entry);
        $lastModFile = $entry;
    }
}