This repository has been archived on 2024-04-08. You can view files and clone it, but cannot push or open issues or pull requests.
lnkohana/system/classes/Kohana/Upload.php
2014-09-06 23:43:07 +10:00

257 lines
6.5 KiB
PHP

<?php defined('SYSPATH') OR die('No direct script access.');
/**
* Upload helper class for working with uploaded files and [Validation].
*
* $array = Validation::factory($_FILES);
*
* [!!] Remember to define your form with "enctype=multipart/form-data" or file
* uploading will not work!
*
* The following configuration properties can be set:
*
* - [Upload::$remove_spaces]
* - [Upload::$default_directory]
*
* @package Kohana
* @category Helpers
* @author Kohana Team
* @copyright (c) 2007-2012 Kohana Team
* @license http://kohanaframework.org/license
*/
class Kohana_Upload {
/**
* @var boolean remove spaces in uploaded files
*/
public static $remove_spaces = TRUE;
/**
* @var string default upload directory
*/
public static $default_directory = 'upload';
/**
* Save an uploaded file to a new location. If no filename is provided,
* the original filename will be used, with a unique prefix added.
*
* This method should be used after validating the $_FILES array:
*
* if ($array->check())
* {
* // Upload is valid, save it
* Upload::save($array['file']);
* }
*
* @param array $file uploaded file data
* @param string $filename new filename
* @param string $directory new directory
* @param integer $chmod chmod mask
* @return string on success, full path to new file
* @return FALSE on failure
*/
public static function save(array $file, $filename = NULL, $directory = NULL, $chmod = 0644)
{
if ( ! isset($file['tmp_name']) OR ! is_uploaded_file($file['tmp_name']))
{
// Ignore corrupted uploads
return FALSE;
}
if ($filename === NULL)
{
// Use the default filename, with a timestamp pre-pended
$filename = uniqid().$file['name'];
}
if (Upload::$remove_spaces === TRUE)
{
// Remove spaces from the filename
$filename = preg_replace('/\s+/u', '_', $filename);
}
if ($directory === NULL)
{
// Use the pre-configured upload directory
$directory = Upload::$default_directory;
}
if ( ! is_dir($directory) OR ! is_writable(realpath($directory)))
{
throw new Kohana_Exception('Directory :dir must be writable',
array(':dir' => Debug::path($directory)));
}
// Make the filename into a complete path
$filename = realpath($directory).DIRECTORY_SEPARATOR.$filename;
if (move_uploaded_file($file['tmp_name'], $filename))
{
if ($chmod !== FALSE)
{
// Set permissions on filename
chmod($filename, $chmod);
}
// Return new file path
return $filename;
}
return FALSE;
}
/**
* Tests if upload data is valid, even if no file was uploaded. If you
* _do_ require a file to be uploaded, add the [Upload::not_empty] rule
* before this rule.
*
* $array->rule('file', 'Upload::valid')
*
* @param array $file $_FILES item
* @return bool
*/
public static function valid($file)
{
return (isset($file['error'])
AND isset($file['name'])
AND isset($file['type'])
AND isset($file['tmp_name'])
AND isset($file['size']));
}
/**
* Tests if a successful upload has been made.
*
* $array->rule('file', 'Upload::not_empty');
*
* @param array $file $_FILES item
* @return bool
*/
public static function not_empty(array $file)
{
return (isset($file['error'])
AND isset($file['tmp_name'])
AND $file['error'] === UPLOAD_ERR_OK
AND is_uploaded_file($file['tmp_name']));
}
/**
* Test if an uploaded file is an allowed file type, by extension.
*
* $array->rule('file', 'Upload::type', array(':value', array('jpg', 'png', 'gif')));
*
* @param array $file $_FILES item
* @param array $allowed allowed file extensions
* @return bool
*/
public static function type(array $file, array $allowed)
{
if ($file['error'] !== UPLOAD_ERR_OK)
return TRUE;
$ext = strtolower(pathinfo($file['name'], PATHINFO_EXTENSION));
return in_array($ext, $allowed);
}
/**
* Validation rule to test if an uploaded file is allowed by file size.
* File sizes are defined as: SB, where S is the size (1, 8.5, 300, etc.)
* and B is the byte unit (K, MiB, GB, etc.). All valid byte units are
* defined in Num::$byte_units
*
* $array->rule('file', 'Upload::size', array(':value', '1M'))
* $array->rule('file', 'Upload::size', array(':value', '2.5KiB'))
*
* @param array $file $_FILES item
* @param string $size maximum file size allowed
* @return bool
*/
public static function size(array $file, $size)
{
if ($file['error'] === UPLOAD_ERR_INI_SIZE)
{
// Upload is larger than PHP allowed size (upload_max_filesize)
return FALSE;
}
if ($file['error'] !== UPLOAD_ERR_OK)
{
// The upload failed, no size to check
return TRUE;
}
// Convert the provided size to bytes for comparison
$size = Num::bytes($size);
// Test that the file is under or equal to the max size
return ($file['size'] <= $size);
}
/**
* Validation rule to test if an upload is an image and, optionally, is the correct size.
*
* // The "image" file must be an image
* $array->rule('image', 'Upload::image')
*
* // The "photo" file has a maximum size of 640x480 pixels
* $array->rule('photo', 'Upload::image', array(':value', 640, 480));
*
* // The "image" file must be exactly 100x100 pixels
* $array->rule('image', 'Upload::image', array(':value', 100, 100, TRUE));
*
*
* @param array $file $_FILES item
* @param integer $max_width maximum width of image
* @param integer $max_height maximum height of image
* @param boolean $exact match width and height exactly?
* @return boolean
*/
public static function image(array $file, $max_width = NULL, $max_height = NULL, $exact = FALSE)
{
if (Upload::not_empty($file))
{
try
{
// Get the width and height from the uploaded image
list($width, $height) = getimagesize($file['tmp_name']);
}
catch (ErrorException $e)
{
// Ignore read errors
}
if (empty($width) OR empty($height))
{
// Cannot get image size, cannot validate
return FALSE;
}
if ( ! $max_width)
{
// No limit, use the image width
$max_width = $width;
}
if ( ! $max_height)
{
// No limit, use the image height
$max_height = $height;
}
if ($exact)
{
// Check if dimensions match exactly
return ($width === $max_width AND $height === $max_height);
}
else
{
// Check if size is within maximum dimensions
return ($width <= $max_width AND $height <= $max_height);
}
}
return FALSE;
}
}