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Upload de arquivo

/ Published in: PHP
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Função muito boa criada por Sean Nall.

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  1. <?php
  2. # Written by Sean Nall <all.marx {at} gmail>
  3. # and placed into the public domain.
  4.  
  5. # @function upload_file
  6. # 
  7. # @param $field        string        the name of the file upload form field
  8. # @param $dirPath    string        the relative path to which to store the file (no trailing slash)
  9. # @param $maxSize    int            the maximum size of the file
  10. # @param $allowed    array        an array containing all the "allowed" file mime-types
  11. #
  12. # @return mixed        the files' stored path on success, false on failure.
  13. function upload_file($field = '', $dirPath = '', $maxSize = 100000, $allowed = array())
  14. {
  15.     foreach ($_FILES[$field] as $key => $val)
  16.         $$key = $val; 
  17.  
  18.     if ((!is_uploaded_file($tmp_name)) || ($error != 0) || ($size == 0) || ($size > $maxSize))
  19.         return false;    // file failed basic validation checks
  20.  
  21.     if ((is_array($allowed)) && (!empty($allowed)))
  22.         if (!in_array($type, $allowed))  
  23.             return false;    // file is not an allowed type
  24.  
  25.     do $path = $dirPath . DIRECTORY_SEPARATOR . rand(1, 9999) . strtolower(basename($name));
  26.     while (file_exists($path));
  27.  
  28.     if (move_uploaded_file($tmp_name, $path))
  29.         return $path;
  30.  
  31.     return false;
  32. }
  33. ?>
  34.  
  35. DEMO:
  36. <?php
  37.  
  38. if (array_key_exists('submit', $_POST))  // form has been submitted
  39. {
  40.     if ($filepath = upload_file('music_upload', 'music_files', 700000, array('audio/mpeg','audio/wav')))
  41.         echo 'File uploaded to ' . $filepath;
  42.     else
  43.         echo 'An error occurred uploading the file... please try again.';
  44. }
  45. echo '    
  46.         <form method="post" action="' .$_SERVER['PHP_SELF']. '" enctype="multipart/form-data">
  47.             <input type="file" name="music_upload" id="music_upload" />
  48.             <input type="submit" name="submit" value="submit" />
  49.         </form>
  50.     ';
  51.  
  52. print_r($_FILES);     // for debug purposes
  53.  
  54. ?>

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