file index.php

Codice PHP:
<?php require_once("maxUpload.class.php"); ?>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
   <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
   <title>Max's File Uploader</title>
   <link href="style/style.css" rel="stylesheet" type="text/css" />
</head>

<body>
<?php
    $myUpload 
= new maxUpload(); 
    
//$myUpload->setUploadLocation(getcwd().DIRECTORY_SEPARATOR);
    
$myUpload->uploadFile();
?>
</body>

maxUpload.class.php


Codice PHP:
<?php
/*************************************************
 * Max's File Uploader
 *
 * Version: 1.0
 * Date: 2007-11-26
 *
 ****************************************************/
class maxUpload{
    var 
$uploadLocation;
    
    
/**
     * Constructor to initialize class varaibles
     * The uploadLocation will be set to the actual 
     * working directory
     *
     * @return maxUpload
     */
    
function maxUpload(){
        
$this->uploadLocation getcwd().DIRECTORY_SEPARATOR;
    }

    
/**
     * This function sets the directory where to upload the file
     * In case of Windows server use the form: c:\\temp\\
     * In case of Unix server use the form: /tmp/
     *
     * @param String Directory where to store the files
     */
    
function setUploadLocation($dir){
        
$this->uploadLocation $dir;
    }
    
    function 
showUploadForm($msg='',$error=''){
?>
       <div id="container">
            <div id="header"><div id="header_left"></div>
            <div id="header_main">Max's File Uploader</div><div id="header_right"></div></div>
            <div id="content">
<?php
if ($msg != ''){
    echo 
'<p class="msg">'.$msg.'</p>';
} else if (
$error != ''){
    echo 
'<p class="emsg">'.$error.'</p>';

}
?>
                <form action="" method="post" enctype="multipart/form-data" >
                     <center>
                         <label>File:
                             <input name="myfile" type="file" size="30" />
                         </label>
                         <label>
                             <input type="submit" name="submitBtn" class="sbtn" value="Upload" />
                         </label>
                     </center>
                 </form>
             </div>
             <div id="footer">[url="http://www.phpf1.com"]Powered by PHP F1[/url]</div>
         </div>
<?php
    
}

    function 
uploadFile(){
        if (!isset(
$_POST['submitBtn'])){
            
$this->showUploadForm();
        } else {
            
$msg '';
            
$error '';
            
            
//Check destination directory
            
if (!file_exists($this->uploadLocation)){
                
$error "The target directory doesn't exists!";
            } else if (!
is_writeable($this->uploadLocation)) {
                
$error "The target directory is not writeable!";
            } else {
                
$target_path $this->uploadLocation basename$_FILES['myfile']['name']);

                if(@
move_uploaded_file($_FILES['myfile']['tmp_name'], $target_path)) {
                    
$msg basename$_FILES['myfile']['name']).
                    
" was uploaded successfully!";
                } else{
                    
$error "The upload process failed!";
                }
            }

            
$this->showUploadForm($msg,$error);
        }

    }

}
?>
Come posso fare in modo di consentire solo di allegare file con url: .doc, .docs, .txt, .rtf???