I make a VERY simple class that monitors a folder (and its subfolders) for new or removed files. I use it in order to auto index a folder where I have all my eBooks into a MySQL database.
CLASS FILE:
<?php
class FileAlterationMonitor
{
private $scanFolder, $initialFoundFiles;
public function __construct($scanFolder)
{
$this->scanFolder = $scanFolder;
$this->updateMonitor();
}
private function _arrayValuesRecursive($array)
{
$arrayValues = array();
foreach ($array as $value)
{
if (is_scalar($value) OR is_resource($value))
{
$arrayValues[] = $value;
}
elseif (is_array($value))
{
$arrayValues = array_merge( $arrayValues, $this->_arrayValuesRecursive($value));
}
}
return $arrayValues;
}
private function _scanDirRecursive($directory)
{
$folderContents = array();
$directory = realpath($directory).DIRECTORY_SEPARATOR;
foreach (scandir($directory) as $folderItem)
{
if ($folderItem != "." AND $folderItem != "..")
{
if (is_dir($directory.$folderItem.DIRECTORY_SEPARATOR))
{
$folderContents[$folderItem] = $this->_scanDirRecursive( $directory.$folderItem."\\");
}
else
{
$folderContents[] = $folderItem;
}
}
}
return $folderContents;
}
public function getNewFiles()
{
$finalFoundFiles = $this->_arrayValuesRecursive( $this->_scanDirRecursive($this->scanFolder));
if ($this->initialFoundFiles != $finalFoundFiles)
{
$newFiles = array_diff($finalFoundFiles, $this->initialFoundFiles);
return empty($newFiles) ? FALSE : $newFiles;
}
}
public function getRemovedFiles()
{
$finalFoundFiles = $this->_arrayValuesRecursive( $this->_scanDirRecursive($this->scanFolder));
if ($this->initialFoundFiles != $finalFoundFiles)
{
$removedFiles = array_diff( $this->initialFoundFiles, $finalFoundFiles);
return empty($removedFiles) ? FALSE : $removedFiles;
}
}
public function updateMonitor()
{
$this->initialFoundFiles = $this->_arrayValuesRecursive($this->_scanDirRecursive( $this->scanFolder));
}
}
?>
A simple script that uses this class could be like this one (use it with PHP CLI):
<?php
$f = new FileAlterationMonitor($MY_FOLDER_TO_MONITOR)
while (TRUE)
{
sleep(1);
if ($newFiles = $f->getNewFiles())
{
// Code to handle new files
// $newFiles is an array that contains added files
}
if ($removedFiles = $f->getRemovedFiles())
{
// Code to handle removed files
// $newFiles is an array that contains removed files
}
$f->updateMonitor();
}
XXXV. File Alteration Monitor FunctionsВведениеFAM monitors files and directories, notifying interested applications of changes. More information about FAM is available at http://oss.sgi.com/projects/fam/. A PHP script may specify a list of files for FAM to monitor using the functions provided by this extension. The FAM process is started when the first connection from any application to it is opened. It exits after all connections to it have been closed.
ТребованияThis extension uses the functions of the FAM library, developed by SGI. Therefore you have to download and install the FAM library. УстановкаTo use PHP's FAM support you must compile PHP --with-fam[=DIR] where DIR is the location of the directory containing the lib and include directories. Настройка во время выполненияДанное расширение не определяет никакие директивы конфигурации в php.ini. Предопределенные константыПеречисленные ниже константы определены данным расширением и могут быть доступны только в том случае, если PHP был собран с поддержкой этого расширения или же в том случае, если данное расширение подгружается во время выполнения. Таблица 1. FAM event constants
File Alteration Monitor Functions
Yassin Ezbakhe <yassin88 at gmail dot com>
31-Aug-2005 04:16
ca50015 at yahoo dot com
27-Nov-2004 09:17
if u want do recursive monitoring on directory tree,
b e n a d l e r -at- g m x -d-o-t- net
11-Aug-2004 10:57
in the example above, I would not use the while(1) and sleep() functions, since then you're back at waiting and polling for file changes, which you were trying to avoid using fam.
sergiopaternoster at no_spam_tiscali dot it
21-May-2004 09:20
Here is a simple script to check changes etc. to a file.
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expect_popen