WLScripting.com » File Manipulation

Move file

Daniel — Thu, 01 May 2008 20:08:35 +0000

This tutorial / piece of code will show you how to move a file on your website to another location. For instance you have a web application to approve or deny file uploads. Using this function will make make it easier to process this task.

function moveFile($file, $newFolder) {
        // Check if the move to directory actually exists if not return an error
	if (!is_dir($newFolder)) {
		return 'Move to folder '.$newFolder.' does not exist';
	}
	
        // Make sure that are $newFolder variable ends with a /
	$newFolder = (in_array(substr($newFolder, -1), array('/', '\')) ? $newFolder : $newFolder.'/');
	
        // Check to make sure the file you want to move actually exists
	if (is_file($file)) {
                // Get the filename of the file to be moved
		$filename = basename($file);
		rename($file, $newFolder.$filename);
		return 'File '.$filename.' moved to '.$newFolder;
	}
	return 'File '.$file.' does not exist';
}
?>

Then to use the code you would use something like:

moveFile('file1.txt', 'movehere/');
?>

Enjoy!

Prevent direct file access

Daniel — Thu, 16 Aug 2007 17:52:51 +0000

Do you have PHP files that you do not want visitors to directly run but would still like to use them in your code? Here is a little trick picked up from the code in the phpBB forum code.

Create a file named config.php or some other file that you are going to include before any other code. In this file put the following:

define('INMYSCRIPT', 1);
?>

This code creates a defined variable INMYSCRIPT which can be named as anything that you want. Then on every other page in your script that you do not want to be ran on their own put the following: (This filename is code.php)

if(!defined('INMYSCRIPT')){
echo 'You cannot access this file directly.';
die;
}

// Whatever other code you wish goes below here
echo 'This file is safe to be ran';
?>

Now, instead of the file outputting any data to the browser that could be harmful, the only content output is: “You cannot access this file directly”. You could very easily create a re-direct script to transfer them to a specific page or you could modify the text to any other HTML or other content you wanted.

Open up your web browser and try accessing code.php. You should get that error message that we created. Now if you create one last file that we will name as test.php, place the following:

require('config.php');
require('code.php');
?>

Now if you try accessing the test.php file from your web server you will be shown: “This file is safe to be ran”.

Very basic file upload information

Daniel — Tue, 15 Aug 2006 02:00:29 +0000

Here is a very basic code that will help you find all the information about a file being uploaded.



  
  
  Very Basic file upload info
  
  
  echo $_SERVER['PHP_SELF']; ?>" method="POST" enctype="multipart/form-data">
    
    
  
if($_FILES) {
  $ext = explode('.',$_FILES['uFile']['name']);
  $extension = count($ext) - 1;
  echo 'Type: '.$_FILES['uFile']['type'].'
';
  echo 'Name: '.$_FILES['uFile']['name'].'
';
  echo 'tmp_name: '.$_FILES['uFile']['tmp_name'].'
';
  echo 'Size: '.$_FILES['uFile']['size'].'
';
  echo 'Extension: '.$ext[$extension].'
';
  move_uploaded_file($_FILES['uFile']['tmp_name'], "/path/to/uploads/".$_FILES['uFile']['name']);
}
?>

The main key to this code is in the form. You MUST include the:

enctype="multipart/form-data"

The next key part is the input type. You must have an input type as file instead of text.
Then you can just use the $_FILES variable to get all the information you need.

Make sure that you change the “/path/to/uploads/” in the move_uploaded_file() line to the path of where the file will be uploaded to.

If you forget what information you can get from the $_FILES variable just do a print_r($_FILES) and you can see everything.

Hope you enjoy.

File Include Check

Daniel — Tue, 01 Aug 2006 00:15:49 +0000

Does your website have several files that are included? Do you not want to have them output anything if they are addressed directly? Here is a very simple script to do that:

function amIincluded() {
  $requestedURL = parse_url($_SERVER['REQUEST_URI']);
  if(basename($requestedURL['path']) != basename(__FILE__))
   return true;
  return false;
}
?>

This amIincluded function gets the address of the page in your browser. Then it parses that into its parts and gets the filename. If that filename is the same as the filename of the file, it returns true otherwise it returns false.

A sample usage of this is:

if(amIincluded()) {
echo 'Included';
} else {
echo 'Not Included';
}
?>

Directory Size

Daniel — Thu, 27 Jul 2006 14:34:59 +0000

Creating a script to display the size of a directory is fairly simple. First off you need to know the path to the directory. After that is known you can use the following fuction to display the filesize:

function dirsize($dir) {
  $dirs = array($dir);
    while(!empty($dirs)) { // Loop through all directories
      $path = array_shift($dirs);

      foreach(glob($path.'/*') AS $next) {
        if(is_dir($next)) {
          $dirs[] = $next; // Add another directory to the loop
        } else {
          $size += filesize ($next); // Add filesize to count
        }
      }
    }
  return $size; // Return the total filesize of the directory
}
?>

This function returns a string with the size of the directory in bytes. You can however use the Convert byte count function to produce a readable format.

An example of this code could be:

$path = '.';
echo dirsize($path); // would produce something like 732952 or 715.79 KB using the Convert byte count function
?>

Convert byte count

Daniel — Fri, 14 Jul 2006 13:37:59 +0000

So you have the byte count of a file but you don’t have the time to try converting it in your head to KB or MB. Using the following code this is easy.

function convertbytes($data) {
if($data < 1024) {
return $data." bytes";
} elseif($data < 1024000) {
return round(($data / 1024), 2)." k";
} else {
return round(($data / 1048576), 2)." MB";
}
}
?>

Just supply the filesize in the function and it will return the filesize in an easier to readable format.

An example of this could be:

echo convertbytes(filesize('/path/to/your/file.php'));
echo convertbytes('10000'); // would output 9.77 k
?>

Enjoy!