Magento 1.9- upload multiple files with Varien_File_Uploader

Topic 1: upload file with Varien_File_Uploader .

Topic 2: How can I upload image using Varien_File_Uploader in magento?

Topic 3: Upload image using default magento function.

We can find above topic's solution in below code.

 
 if(isset($_FILES['add_image']['name']) && $_FILES['add_image']['name'] != '') {
 try {
  /* Starting upload */
  $uploader = new Varien_File_Uploader('add_image');

  // Any extention would work
  $uploader->setAllowedExtensions(array('jpg','jpeg','gif','png'));
  $uploader->setAllowRenameFiles(false);

  $uploader->setFilesDispersion(true);

  // We set media as the upload dir
  $path = Mage::getBaseDir('media') . DS . 'projectphoto' . DS . 'image' . DS;
  $uploader->save($path, $_FILES['add_image']['name'] );
  echo '-->'.$img_name = $uploader->getUploadedFileName();
 } catch (Exception $e) {

 }
}