### 表单和过滤
**表单类**
设置 HTML 表单元素的名称、类型等
> module/Album/src/Form/AlbumForm.php
```php
namespace Album\Form;
use Zend\Form\Form;
class AlbumForm extends Form
{
public function __construct($name = null)
{
// We will ignore the name provided to the constructor
parent::__construct('album');
$this->add([
'name' => 'id',
'type' => 'hidden',
]);
$this->add([
'name' => 'title',
'type' => 'text',
'options' => [
'label' => 'Title',
],
]);
$this->add([
'name' => 'artist',
'type' => 'text',
'options' => [
'label' => 'Artist',
],
]);
$this->add([
'name' => 'submit',
'type' => 'submit',
'attributes' => [
'value' => 'Go',
'id' => 'submitbutton',
],
]);
}
}
```
**模型类**
设置表单过滤器
> module/Album/src/Model/Album.php
```php
namespace Album\Model;
// Add the following import statements:
use DomainException;
use Zend\Filter\StringTrim;
use Zend\Filter\StripTags;
use Zend\Filter\ToInt;
use Zend\InputFilter\InputFilter;
use Zend\InputFilter\InputFilterAwareInterface;
use Zend\InputFilter\InputFilterInterface;
use Zend\Validator\StringLength;
class Album implements InputFilterAwareInterface
{
public $id;
public $artist;
public $title;
// Add this property:
private $inputFilter;
public function exchangeArray(array $data)
{
$this->id = !empty($data['id']) ? $data['id'] : null;
$this->artist = !empty($data['artist']) ? $data['artist'] : null;
$this->title = !empty($data['title']) ? $data['title'] : null;
}
// Add the following method:
public function getArrayCopy()
{
return [
'id' => $this->id,
'artist' => $this->artist,
'title' => $this->title,
];
}
/* Add the following methods: */
public function setInputFilter(InputFilterInterface $inputFilter)
{
throw new DomainException(sprintf(
'%s does not allow injection of an alternate input filter',
__CLASS__
));
}
public function getInputFilter()
{
if ($this->inputFilter) {
return $this->inputFilter;
}
$inputFilter = new InputFilter();
$inputFilter->add([
'name' => 'id',
'required' => true,
'filters' => [
['name' => ToInt::class],
],
]);
$inputFilter->add([
'name' => 'artist',
'required' => true,
'filters' => [
['name' => StripTags::class],
['name' => StringTrim::class],
],
'validators' => [
[
'name' => StringLength::class,
'options' => [
'encoding' => 'UTF-8',
'min' => 1,
'max' => 100,
],
],
],
]);
$inputFilter->add([
'name' => 'title',
'required' => true,
'filters' => [
['name' => StripTags::class],
['name' => StringTrim::class],
],
'validators' => [
[
'name' => StringLength::class,
'options' => [
'encoding' => 'UTF-8',
'min' => 1,
'max' => 100,
],
],
],
]);
$this->inputFilter = $inputFilter;
return $this->inputFilter;
}
}
```
