PrestaShop | Image upload

gistfile1.php

$field_name = 'block_img';
$temp_name = tempnam(_PS_TMP_IMG_DIR_, 'PS');
$salt = sha1(microtime());				
$type = strtolower(substr(strrchr($_FILES[$field_name]['name'], '.'), 1));
if ($error = ImageManager::validateUpload($_FILES[$field_name]))
	$this->_html .= $this->displayError($error);
elseif (!$temp_name || !move_uploaded_file($_FILES[$field_name]['tmp_name'], $temp_name))
	$this->_html .= $this->displayError($this->l('An error occurred during the image upload'));
elseif (!ImageManager::resize($temp_name, dirname(__FILE__).'/img/'.$salt.'.'.$type))
	$this->_html .= $this->displayError($this->l('An error occurred during the image upload.'));
if (isset($temp_name))
	@unlink($temp_name);