Zend Framework: Uploading and renaming multiple files

Waf!, I used Zend_File component about two month back. Did I test that before writing an article, yes surely, I did. But what, I did that for only one file, though I was intending to upload multiple files. I didn’t check my directory, however no exception was thrown and no error message jumped out. I thought that I have successfully completed my job and now its time to write an article to help those needed.

Sorry gays, I was completely wrong. The example, if you have used upload only one file.

A person once post his/her comments that It won’t upload multiple files, however I was having enough time to test my code again.

But today I decided that I will need to do something and make this example working as I was intending to make it. So I’m here to tell you how to upload multiple files.

An addition to uploading multiple files, I’d show you how to rename files.

In the first example I’d tell you how to upload multiple files and then in the second example I’d tell you how to rename them if you like.

So let have a look.

First of all, create your form as

<?php

class CustomForm extends Zend_Dojo_Form

{

public function init()

{

$this->setMethod(‘post’);

$this->setAttrib(‘enctype’, ‘multipart/form-data’);

$ this ->addElement(‘file’,'file1′,array(‘label’=>’File1′));

$ this ->addElement(‘file’,'file2′,array(‘label’=>’File1′));

$ this ->addElement(‘submit’,'submit’);

}

}

In the code above we have done thing more than creating a form, setting its method, enctype, add two file elements and submit button.

Now in controller write

$form = new CustomForm();

$this->view->form = $form;

if($this->getRequest()->isPost()) {

if  ($form->isValid($_POST)) {

$adapter=new Zend_File_Transfer_Adapter_Http();

$uploadDir=dirname(__File__);

$adapter->setDestination($uploadDir);

foreach ($adapter->getFileInfo() as $info) {

if(!$adapter->receive($info['name'])){

$this->view->msg=$adapter->getMessages();

return;

}

}

}

}

Okay, the entire logic is written in the above code. First we create our own custom form instance and assign it to the view template. Then we check if the form is submitted by using isPost() method. In the next condition we check if the form is validly posted. I yes, we create an adapter. You will need to create transfer adapter.

In the next line we set our destination directory, directory we want to upload our files.

Foreach loop is compulsory for uploading multiple files, if you want to upload single file then there is no need to use this loop.

After the foreach loop we call receive method giving name of each file.

That’s it, we have done.

Renaming files will take some extra code. Make the following changes in your controller.

$form = new CustomForm();

$this->view->form = $form;

if($this->getRequest()->isPost()) {

if  ($form->isValid($_POST)) {

$adapter=new Zend_File_Transfer_Adapter_Http();

$uploadDir=dirname(__File__);

$adapter->setDestination($uploadDir);

$i= 1;

foreach ($adapter->getFileInfo() as $info) {

$ext = $this->_findexts($info['name']);

$fileName = ‘file’.$i.time().”.”.$ext;

$i++;

$adapter->addFilter(‘Rename’,

array(‘target’ => $uploadDir.DIRECTORY_SEPARATOR.$fileName,

‘overwrite’ => true));

if(!$adapter->receive($info['name'])){

$this->view->msg=$adapter->getMessages();

return;

}

}

}

}

protected function _findexts($filename)

{

$filename = strtolower($filename) ;

$exts = split(“[/\\.]“, $filename) ;

$n = count($exts)-1;

$exts = $exts[$n];

return $exts;

}

The only change made are in bold. We have defined a protected method for find the extension.

We call this function to get the file extension, which is concatenated with the name of the file, we are building.

The real part is performed by

$adapter->addFilter(‘Rename’,

array(‘target’ => $uploadDir.DIRECTORY_SEPARATOR.$fileName,

‘overwrite’ => true));

Here if don’t give “overwrite”, zend will generate error if file with the same name already exist.

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