how to validate multiple file upload field in php? - php

Question

I'm trying to upload several files with their names in different field.
example--- there are 3 form fields for inserting names and 3 fields for uploading files in there respective order.
this is image attached, fr what i'm trying to achieve --
http://imgur.com/pGAlsjF
Now what i want is, when a user enters name in "document name" label in first field and selects a file to upload in "document file" label first field, then data gets inserted. else shows an error.
user should enter file name select file in there respective order, else it should show error.
it should error when a user enters name in first field and selects a file in second field then it should display error.
this is being done opencart admin section.
currently this is the simple code for simple validation --
foreach ($this->request->post['document_description'] as $language_id => $value) {
if ((utf8_strlen($value['name']) < 3) || (utf8_strlen($value['name']) > 64)) {
$this->error['name'][$language_id] = $this->language->get('error_name');
}
}
One thing is common between file name field and form upload field is "language id".
code for documents.php are ---
protected function getForm() {
$this->data['heading_title'] = $this->language->get('heading_title');
$this->data['entry_name'] = $this->language->get('entry_name');
$this->data['entry_filename'] = $this->language->get('entry_filename');
$this->data['entry_mask'] = $this->language->get('entry_mask');
$this->data['entry_remaining'] = $this->language->get('entry_remaining');
$this->data['entry_update'] = $this->language->get('entry_update');
$this->data['button_save'] = $this->language->get('button_save');
$this->data['button_cancel'] = $this->language->get('button_cancel');
$this->data['button_upload'] = $this->language->get('button_upload');
if (isset($this->error['warning'])) {
$this->data['error_warning'] = $this->error['warning'];
} else {
$this->data['error_warning'] = '';
}
if (isset($this->error['name'])) {
$this->data['error_name'] = $this->error['name'];
} else {
$this->data['error_name'] = array();
}
if (isset($this->error['filename'])) {
$this->data['error_filename'] = $this->error['filename'];
} else {
$this->data['error_filename'] = '';
}
$this->data['breadcrumbs'] = array();
$this->data['breadcrumbs'][] = array(
'text' => $this->language->get('text_home'),
'href' => $this->url->link('common/home', 'token=' . $this->session->data['token'], 'SSL'),
'separator' => false
);
$this->data['breadcrumbs'][] = array(
'text' => $this->language->get('heading_title'),
'href' => $this->url->link('catalog/documents', 'token=' . $this->session->data['token'] . $url, 'SSL'),
'separator' => ' :: '
);
if (!isset($this->request->get['document_id'])) {
$this->data['action'] = $this->url->link('catalog/documents/insert', 'token=' . $this->session->data['token'] . $url, 'SSL');
} else {
$this->data['action'] = $this->url->link('catalog/documents/update', 'token=' . $this->session->data['token'] . '&document_id=' . $this->request->get['document_id'] . $url, 'SSL');
}
$this->data['cancel'] = $this->url->link('catalog/documents', 'token=' . $this->session->data['token'] . $url, 'SSL');
$this->load->model('localisation/language');
$this->data['languages'] = $this->model_localisation_language->getLanguages();
if (isset($this->request->get['document_id']) && ($this->request->server['REQUEST_METHOD'] != 'POST')) {
$document_info = $this->model_catalog_documents->getDocument($this->request->get['document_id']);
}
$this->data['token'] = $this->session->data['token'];
if (isset($this->request->get['document_id'])) {
$this->data['document_id'] = $this->request->get['document_id'];
} else {
$this->data['document_id'] = 0;
}
if (isset($this->request->post['document_description'])) {
$this->data['document_description'] = $this->request->post['document_description'];
} elseif (isset($this->request->get['document_id'])) {
$this->data['document_description'] = $this->model_catalog_documents->getDocumentDescriptions($this->request->get['document_id']);
} else {
$this->data['document_description'] = array();
}
if (isset($this->request->post['filename'])) {
$this->data['filename'] = $this->request->post['filename'];
} elseif (!empty($document_info)) {
$this->data['filename'] = $document_info['filename'];
} else {
$this->data['filename'] = '';
}
if (isset($this->request->post['mask'])) {
$this->data['mask'] = $this->request->post['mask'];
} elseif (!empty($document_info)) {
$this->data['mask'] = $document_info['mask'];
} else {
$this->data['mask'] = '';
}
if (isset($this->request->post['remaining'])) {
$this->data['remaining'] = $this->request->post['remaining'];
} elseif (!empty($document_info)) {
$this->data['remaining'] = $document_info['remaining'];
} else {
$this->data['remaining'] = 1;
}
if (isset($this->request->post['update'])) {
$this->data['update'] = $this->request->post['update'];
} else {
$this->data['update'] = false;
}
$this->template = 'catalog/documents_form.tpl';
$this->children = array(
'common/header',
'common/footer'
);
$this->response->setOutput($this->render());
}
protected function validateForm() {
if (!$this->user->hasPermission('modify', 'catalog/documents')) {
$this->error['warning'] = $this->language->get('error_permission');
}
print_r($this->request->post['document_description']); echo "<br>";
print_r($this->request->files['document_files']); echo "<br>";
foreach ($this->request->files['document_files'] as $files => $value)
{
print_r($files.'==>'.print_r($value)); echo "<br>";
}die;
foreach ($this->request->post['document_description'] as $language_id => $value) {
foreach ($this->request->files['document_files'] as $selected => $filename)
{
if ((utf8_strlen($value['name']) < 3) || (utf8_strlen($value['name']) > 64))
{
$this->error['name'][$language_id] = $this->language->get('error_name');
}
if (empty($filename))
{
$this->error['name'][$language_id] = $this->language->get('error_name');
}
}
}
if (!$this->error) {
return true;
} else {
return false;
}
}
public function upload() {
$this->language->load('sale/order');
$json = array();
if (!$this->user->hasPermission('modify', 'catalog/documents')) {
$json['error'] = $this->language->get('error_permission');
}
if (!isset($json['error'])) {
if (!empty($this->request->files['file']['name'])) {
$filename = basename(html_entity_decode($this->request->files['file']['name'], ENT_QUOTES, 'UTF-8'));
if ((utf8_strlen($filename) < 3) || (utf8_strlen($filename) > 128)) {
$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'] = $this->language->get('error_filetype');
}
if ($this->request->files['file']['error'] != UPLOAD_ERR_OK) {
$json['error'] = $this->language->get('error_upload_' . $this->request->files['file']['error']);
}
if ($this->request->files['file']['error'] != UPLOAD_ERR_OK) {
$json['error'] = $this->language->get('error_upload_' . $this->request->files['file']['error']);
}
} else {
$json['error'] = $this->language->get('error_upload');
}
}
if (!isset($json['error'])) {
if (is_uploaded_file($this->request->files['file']['tmp_name']) && file_exists($this->request->files['file']['tmp_name'])) {
$ext = md5(mt_rand());
$json['filename'] = $filename . '.' . $ext;
$json['mask'] = $filename;
move_uploaded_file($this->request->files['file']['tmp_name'], DIR_DOWNLOAD . $filename . '.' . $ext);
}
$json['success'] = $this->language->get('text_upload');
}
$this->response->setOutput(json_encode($json));
}

Answer 1

Place the document name fields next to the document file field and hide it at first. Then display the document name fields when file is selected (jQuery - Detecting if a file has been selected in the file input).
In admin/controller/catalog/product.php, there is a function: validateForm where all validations are done. Within that function a foreach is used for language based validations:
foreach ($this->request->post['product_description'] as $language_id => $value) {
...........
//add your validation code here like:
if (trim($value['download_name']) == '' && $value['download_file'] == '' ) {
$this->error['downloadfile'][$language_id] = $this->language->get('error_ownloadfile');
}
...........
}// end of foreach