how to create an array element in form - zend framework 2

Question

I want to create the following element :

<input type="file" name="file[]">

I have tried the following code in myproject/module/Member/src/Member/Form/EditForm.php :

$this->add(array(
            'name' => 'file',
            'type'  => 'file',
            'attributes' => array(                
                'class' => 'form-control col-md-7 col-xs-12',                
                'id' => 'file',                
            ),'options' => array(
                'multiple'=>TRUE
            ),
        ));

and

$this->add(array(
            'name' => 'file[]',
            'type'  => 'file',
            'attributes' => array(                
                'class' => 'form-control col-md-7 col-xs-12',                
                'id' => 'file',                
            ),'options' => array(
                'multiple'=>TRUE
            ),
        ));

but it is not working.

Answer 1

For file upload Zend Framework 2 has a special FileInput class .

It is important to use this class because it also does other important things like validation before filtering . There are also special filters like the File\\RenameUpload that renames the upload for you.

Considering that $this is your InputFilter instance the code could look like this:

$this->add(array(
    'name' => 'file',
    'required' => true,
    'allow_empty' => false,
    'filters' => array(
        array(
            'name' => 'File\RenameUpload',
            'options' => array(
                'target' => 'upload',
                'randomize' => true,
                'overwrite' => true
            )
        )
    ),
    'validators' => array(
        array(
            'name' => 'FileSize',
            'options' => array(
                'max' => 10 * 1024 * 1024 // 10MB
            )
        )
    ),
    // IMPORTANT: this will make sure you get the `FileInput` class
    'type' => 'Zend\InputFilter\FileInput'
);

To attach file element to a form:

// File Input
$file = new Element\File('file');
$file->setLabel('My file upload')
     ->setAttribute('id', 'file');
$this->add($file);

Check the documentation for more information on file upload. Or check the documentation here on how to make an upload form