#!/usr/bin/php
<?php 
    // Constant as shortcut for line feed characters 
    define('LF', "\r\n"); 

    // Path to the observed directory 
    $path           = '/kunden/abc.de/datenaustausch/daten'; 

    // Path to the file that contains the list of uploaded files and directories 
    $checkfile_path = dirname(__FILE__).'/checkfile.txt'; 

    // Interval: not needed; the script is called by conjob 
    // $interval       = '300'; 

    // The e-mail address the list of new files is sent to 
    $empfaenger     = 'abc@abc.de'; 

    // The subject of the e-mail 
    $betreff        = 'Neuer Dateneingang im Kunden-Ordner'; 

    // The headers of the e-mail 
    $header         = 'From: abc@abc.de'.LF. 
                      'Reply-To: abc@abc.de'.LF. 
                      'X-Mailer: PHP/'.phpversion(); 


    // Not needed; the script is called by conjob, see above 
    // $lastrun = time() - $interval; 

    // Clear the cache that is used by some file system functions 
    clearstatcache(); 

    if (!file_exists($checkfile_path)) { 
        // The list of the already existing files hasn't been created yet 
        $oldfiles = array(); 
    } else { 
        // Read the list of the already existing files into an array and eliminate empty entries 
        $oldfiles = explode(LF, file_get_contents($checkfile_path)); 
        $oldfiles = array_unique($oldfiles); 
        $empty_string_element = array_search('', $oldfiles); 
        if (false !== $empty_string_element) { 
            unset($oldfiles[$empty_string_element]); 
        } 
    } 

    // List of files that have been removed since the script has been executed the last time 
    // (files that are still in the directory will be deleted from this list later on) 
    $removed_files = $oldfiles; 

    // $newfiles['filename'] holds the new files' file names only, while 
    // $newfiles['message']  holds the messages that are listed in the e-mail 
    $newfiles = array('filename' => array(), 'message' => array()); 
    foreach (glob($path.'/*') as $file) { 
        // Get the file names only, the path is known anyway 
        $filename = basename($file); 

        if (!in_array($filename, $oldfiles)) { 
            // Create separate messages for files and directories 
            if (is_file($file)) { 
                $newfiles['filename'][] = $filename; 
                $newfiles['message'][]  = sprintf('Datei: %s [%01.2f KB]', $filename, (filesize($file) / 1024)); 
            } elseif (is_dir($file)) { 
                $newfiles['filename'][] = $filename; 
                $newfiles['message'][]  = 'Verzeichnis: '.$filename; 
            } 
        } else { 
            // Delete this file from the list of removed files 
            unset($removed_files[array_search($filename, $removed_files)]); 
        } 
    } 

    // Delete the removed files from the old files array 
    $oldfiles = array_diff($oldfiles, $removed_files); 

    $num_newfiles  = count($newfiles['filename']); 
    $files_list = implode(LF, array_merge($oldfiles, $newfiles['filename'])); 

    // Write all existing file names to the file that holds the list of already existing files 
    file_put_contents($checkfile_path, $files_list, LOCK_EX); 

    if ($num_newfiles > 0) { 
        $newfiles_messages_list = implode(LF, $newfiles['message']); 

        // Send the e-mail 
        $mailtext = 'Hallo,'.LF.LF. 
                    'es sind neue Daten im Kunden-Ordner platziert worden.'.LF.LF. 
                    'Gesamtanzahl: '.$num_newfiles.LF.LF. 
                    $newfiles_messages_list; 
        mail($empfaenger, $betreff, $mailtext, $header); 
    } 

    echo $num_newfiles.' neue Dateien/Verzeichnisse gefunden!'; 
?>