Error in Writing to Image file from PHP

Question

I am attempting to write to an image file from a blob.

 if($_POST[\'logoFilename\'] != \'undefined\'){
  $logoFile = fopen($_POST[\'logoFilename\'], \'w\') o         


        

Answer 1

If it's a file upload control, $_POST won't contain the information. You're looking for handling file uploads with $_FILES. (And more specifically, move_uploaded_file)

Given the new update, try the following:

  // 
  // Export a image blob to a file using either the specific image name
  // @blob     : The actual image blob
  // @fileName : Can be the explicit name (with an extension) or this can be
  //             just a generic file name and the extension (based on data
  //             type) will be appended automatically. This can also include
  //             path information.
  // Exmaples:
  //   storeBlob('data:image/png;base64,...', 'myimage');      ::  saves as myimage.png
  //   storeBlob('data:image/jpg;base64,...', 'img/new.jpg');  ::  saves as img/new.jpg
  function storeBlob($blob, $fileName)
  {
    $blobRE = '/^data:((\w+)\/(\w+));base64,(.*)$/';
    if (preg_match($blobRE, $blob, $m))
    {
      $imageName = (preg_match('/\.\w{2,4}$/', $fileName) ? $fileName : sprintf('%s.%s', $fileName, $m[3]));

      return file_put_contents($imageName,base64_decode($m[4]));
    }
    return false; // error
  }