OpenCart 🇺🇦

$this->language->load('product/product');

$json = array();

if (!empty($this->request->files['file']['name'])) {
	$filename = basename(preg_replace('/[^a-zA-Z0-9\.\-\s+]/', '', html_entity_decode($this->request->files['file']['name'], ENT_QUOTES, 'UTF-8')));

	if ((utf8_strlen($filename) < 3) || (utf8_strlen($filename) > 64)) {
		$json['error'] = $this->language->get('error_filename');
	}

	// Allowed file extension types
	$allowed = array();

	$filetypes = explode("\n", $this->config->get('config_file_extension_allowed'));

	foreach ($filetypes as $filetype) {
		$allowed[] = trim($filetype);
	}

	if (!in_array(substr(strrchr($filename, '.'), 1), $allowed)) {
		$json['error'] = $this->language->get('error_filetype');
	}

	// Allowed file mime types
	$allowed = array();

	$filetypes = explode("\n", $this->config->get('config_file_mime_allowed'));

	foreach ($filetypes as $filetype) {
		$allowed[] = trim($filetype);
	}

	if (!in_array($this->request->files['file']['type'], $allowed)) {
		$json['error'] = $this->language->get('error_filetype');
	}

	// Check to see if any PHP files are trying to be uploaded
	$content = file_get_contents($this->request->files['file']['tmp_name']);

	if (preg_match('/\<\?php/i', $content)) {
		$json['error'] = $this->language->get('error_filetype');
	}

	if ($this->request->files['file']['error'] != UPLOAD_ERR_OK) {
		$json['error'] = $this->language->get('error_upload_' . $this->request->files['file']['error']);
	}
} else {
	$json['error'] = $this->language->get('error_upload');
}

if (!$json && is_uploaded_file($this->request->files['file']['tmp_name']) && file_exists($this->request->files['file']['tmp_name'])) {
	$file = basename($filename) . '.' . md5(mt_rand());

	// Hide the uploaded file name so people can not link to it directly.
	$json['file'] = $this->encryption->encrypt($file);

	move_uploaded_file($this->request->files['file']['tmp_name'], DIR_DOWNLOAD . $file);

	$json['success'] = $this->language->get('text_upload');
}

$this->response->setOutput(json_encode($json));