A-simple-php-file-uploader


            upload.php 
// Code Snippet: 
php 
// Upload Form 
function display_upload_form() 
{ 
echo <<  
  
 Yet Another Upload Form 
  
  
  
  
 Select a file.
 
 
 
 
 
  
 
 
  
  
DISPLAY_UPLOAD_FORM;} 
// File Upload 
function execute_upload() 
{ 
 // root path 
 $path = $_SERVER['DOCUMENT_ROOT']; 
 // upload directory. path will originate from root. 
 $dirname = '/uploads'; 
 // permission settings for newly created folders 
 $chmod = 0755; 
 // create file vars to make things easier to read. 
 $filename = $_FILES['myfile']['name']; 
 $filesize = $_FILES['myfile']['size']; 
 $filetype = $_FILES['myfile']['type']; 
 $file_tmp = $_FILES['myfile']['tmp_name']; 
 $file_err = $_FILES['myfile']['error']; 
 $file_ext = strrchr($filename, '.'); 
 // check if user actually put something in the file input field. 
 if (($file_err == 0) && ($filesize != 0)) 
 { 
 // Check extension. 
 if (!$file_ext) 
 { 
 unlink($file_tmp); 
 die('File must have an extension.'); 
 } 
 // extra check to prevent file attacks. 
 if (is_uploaded_file($file_tmp)) 
 { 
 /* 
 * check if the directory exists 
 * if it doesnt exist, make the directory 
 */ 
 $dir = $path . $dirname; 
 if (!is_dir($dir)) 
 { 
 $dir = explode('/', $dirname); 
 foreach ($dir as $sub_dir) 
 { 
 $path .= '/' . $sub_dir; 
 if (!is_dir($path)) 
 { 
 if (!mkdir($path, $chmod)) 
 { 
 unlink($file_tmp); 
 die('Error: Directory does not exist and was unable to be created.'); 
 } 
 } 
 } 
 } 
 /* 
 * copy the file from the temporary upload directory 
 * to its final detination. 
 */ 
 if (@move_uploaded_file($file_tmp, $dir . '/' . $filename)) 
 { 
 // success! 
 echo " 
 Success!
 
 View File: $filename
 
 "; 
 } 
 else 
 { 
 // error moving file. check file permissions. 
 unlink($file_tmp); 
 echo 'Error: Unable to move file to designated directory.'; 
 } 
 } 
 else 
 { 
 // file seems suspicious... delete file and error out. 
 unlink($file_tmp); 
 echo 'Error: File does not appear to be a valid upload. Could be a file attack.'; 
 } 
 } 
 else 
 { 
 // Kill temp file, if any, and display error. 
 if ($file_tmp != '') 
 { 
 unlink($file_tmp); 
 } 
 switch ($file_err) 
 { 
 case '0': 
 echo 'That is not a valid file. 0 byte length.'; 
 break; 
 case '1': 
 echo 'This file, at ' . $filesize . ' bytes, exceeds the maximum allowed file size as set in php.ini. '. 
 'Please contact your system admin.'; 
 break; 
 case '2': 
 echo 'This file exceeds the maximum file size specified in your HTML form.'; 
 break; 
 case '3': 
 echo 'File was only partially uploaded. This could be the result of your connection '. 
 'being dropped in the middle of the upload.'; 
 case '4': 
 echo 'You did not upload anything... Please go back and select a file to upload.'; 
 break; 
 } 
 } 
} 
// Logic Code 
if (isset($_POST['execute'])) 
{ 
 execute_upload(); 
} 
else 
{ 
 display_upload_form(); 
} 
?>
File Directory Php
