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File Upload
Consente di copiare file in una directory scelta. Effettua anche un controllo sul formato, ed eventualmente modifica l'estensione del file ne caso in cui sia errata.
fileupload.class
<?
/*
Error codes:
0 - "No file was uploaded"
1 - "Maximum file size exceeded"
2 - "Maximum image size exceeded"
3 - "Only specified file type may be uploaded"
4 - "File already exists" (save only)
*/
class uploader {
var $file;
var $errors;
var $accepted;
var $new_file;
var $max_filesize;
var $max_image_width;
var $max_image_height;
function max_filesize($size){
$this->max_filesize = $size;
}
function max_image_size($width, $height){
$this->max_image_width = $width;
$this->max_image_height = $height;
}
function upload($filename, $accept_type, $extention) {
// get all the properties of the file
$index = array("file", "name", "size", "type");
for($i = 0; $i < 4; $i++) {
$file_var = '$' . $filename . (($index[$i] != "file") ? "_" .
$index[$i] : "");
eval('global ' . $file_var . ';');
eval('$this->file[$index[$i]] = ' . $file_var . ';');
}
if($this->file["file"] && $this->file["file"]
!= "none") {
//test max size
if($this->max_filesize && $this->file["size"] > $this->max_filesize)
{
$this->errors[1] = "Maximum file size exceeded. File may be no larger
than " . $this->max_filesize/1000 . "KB.";
return False;
}
if(ereg("image", $this->file["type"])) {
$image = getimagesize($this->file["file"]);
$this->file["width"] = $image[0];
$this->file["height"] = $image[1];
// test max image size
if(($this->max_image_width || $this->max_image_height) && (($this->file["width"] > $this->max_image_width)
|| ($this->file["height"] > $this->max_image_height)))
{
$this->errors[2] = "Maximum image size exceeded. Image may be no
more than " . $this->max_image_width . " x " . $this->max_image_height
. " pixels";
return False;
}
switch($image[2]) {
case 1:
$this->file["extention"] = ".gif";
break;
case 2:
$this->file["extention"] = ".jpg";
break;
case 3:
$this->file["extention"] = ".png";
break;
default:
$this->file["extention"] = $extention;
break;
}
}
else if(!ereg("(\.)([a-z0-9]{3,5})$", $this->file["name"]) && !$extention)
{
// add new mime types here
switch($this->file["type"]) {
case "text/plain":
$this->file["extention"]
= ".txt";
break;
default:
break;
}
}
else {
$this->file["extention"] = $extention;
}
// check to see if the file is of type specified
if($accept_type) {
if(ereg($accept_type, $this->file["type"])) { $this->accepted
= True; }
else { $this->errors[3] = "Only " . ereg_replace("\|", " or ",
$accept_type) . " files may be uploaded"; }
}
else { $this->accepted = True; }
}
else { $this->errors[0] = "No file was uploaded"; }
return $this->accepted;
}
function save_file($path, $mode){
global $NEW_NAME;
if($this->accepted) {
// very strict naming of file.. only lowercase letters, numbers and underscores
$new_name = ereg_replace("[^a-z0-9._]", "", ereg_replace(" ", "_",
ereg_replace("%20", "_", strtolower($this->file["name"]))));
// check for extention and remove
if(ereg("(\.)([a-z0-9]{3,5})$", $new_name)) {
$pos = strrpos($new_name, ".");
if(!$this->file["extention"]) { $this->file["extention"]
= substr($new_name, $pos, strlen($new_name)); }
$new_name = substr($new_name, 0, $pos);
}
$this->new_file = $path . $new_name . $this->file["extention"];
$NEW_NAME = $new_name . $this->file["extention"];
switch($mode) {
case 1: // overwrite mode
$aok = copy($this->file["file"], $this->new_file);
break;
case 2: // create new with incremental extention
while(file_exists($path . $new_name . $copy . $this->file["extention"]))
{
$copy = "_copy" . $n;
$n++;
}
$this->new_file = $path . $new_name . $copy . $this->file["extention"];
$aok = copy($this->file["file"], $this->new_file);
break;
case 3: // do nothing if exists, highest protection
if(file_exists($this->new_file)){
$this->errors[4] = "File "" . $this->new_file . ""
already exists";
}
else {
$aok = rename($this->file["file"], $this->new_file);
}
break;
default:
break;
}
if(!$aok) { unset($this->new_file); }
return $aok;
}
}
}
?>
upload.php
<html>
<head>
<title>Upload</title>
</head>
<body>
<?
require("fileupload.class");
$PATH = "uploads/";
$FILENAME = "userfile";
$ACCEPT = "image/gif";
$EXTENSION = "";
$SAVE_MODE = 1;
function print_file($file, $type, $mode) {
if($file) {
if(ereg("image", $type)) {
echo "<img src=\"" . $file . "\" border=\"0\" alt=\"\">";
}
else {
$userfile = fopen($file, "r");
while(!feof($userfile)) {
$line = fgets($userfile, 255);
switch($mode){
case
1:
echo $line;
break;
case 2:
echo nl2br(ereg_replace("\t", " ",
htmlentities($line)));
break;
}
}
}
}
}
$upload = new uploader;
$upload->max_filesize(30000);
if($upload->upload("$FILENAME", "$ACCEPT", "$EXTENSION"))
{
while(list($key, $var) = each($upload->file)){
echo $key . " = " . $var . "<br>";
}
if($upload->save_file("$PATH", $SAVE_MODE)) {
print("<p>Saved as: " . $upload->new_file . "<p>");
print_file($upload->new_file, $upload->file["type"], 2);
}
}
if($upload->errors) {
while(list($key, $var) = each($upload->errors)){
echo "<p>" . $var . "<br>";
}
}
if ($NEW_NAME) {
print("<p>Name of image save: <b>$NEW_NAME</b></p>");
}
?>
<form enctype="multipart/form-data" action="<?print($PHP_SELF);?>" method="POST">
<input type="hidden" name="MAX_FILE_SIZE" value="100000">Send
this file:
<input name="userfile" type="file">
<input type="submit" value="Send File">
</form>
<hr>
<?
if ($ACCEPT) {
print("This form only accepts <b>" . $ACCEPT . "</b> files\n");
}
?>
</body>
</html>
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