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:
Class declared in SYSPATH/classes/Upload.php on line 3.
string $default_directorydefault upload directory
string(6) "upload"boolean $remove_spacesremove spaces in uploaded files
bool TRUE
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));
array
$file
required - $_FILES iteminteger
$max_width
= NULL - Maximum width of imageinteger
$max_height
= NULL - Maximum height of imageboolean
$exact
= bool FALSE - Match width and height exactly?booleanpublic 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;
}Tests if a successful upload has been made.
$array->rule('file', 'Upload::not_empty');
array
$file
required - $_FILES itemboolpublic 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']));
}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']);
}
array
$file
required - Uploaded file datastring
$filename
= NULL - New filenamestring
$directory
= NULL - New directoryinteger
$chmod
= integer 420 - Chmod maskstring - On success, full path to new fileFALSE - On failurepublic 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 $filename;
}
return FALSE;
}Validation rule to test if an uploaded file is allowed by file size. File sizes are defined as: SB, where S is the size (1, 8.5, 300, etc.) and B is the byte unit (K, MiB, GB, etc.). All valid byte units are defined in Num::$byte_units
$array->rule('file', 'Upload::size', array(':value', '1M'))
$array->rule('file', 'Upload::size', array(':value', '2.5KiB'))
array
$file
required - $_FILES itemstring
$size
required - Maximum file size allowedboolpublic 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);
}Test if an uploaded file is an allowed file type, by extension.
$array->rule('file', 'Upload::type', array(':value', array('jpg', 'png', 'gif')));
array
$file
required - $_FILES itemarray
$allowed
required - Allowed file extensionsboolpublic 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);
}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')
array
$file
required - $_FILES itemboolpublic static function valid($file)
{
return (isset($file['error'])
AND isset($file['name'])
AND isset($file['type'])
AND isset($file['tmp_name'])
AND isset($file['size']));
}