文件上传 – 工作示例
让我们修改 tutorial 模块并包含图片上传功能。
修改数据库表
让我们通过执行以下 SQL 命令将imagepath列添加到书籍表中 −
ALTER TABLE `book` ADD `imagepath` VARCHAR(255) NOT NULL AFTER 'imagepath';
更新 BookForm.php
添加文件输入元素以在书籍表单中上传图片 - myapp/module/Tutorial/src/Model/BookForm.php。
在 BookForm 类的__construct方法中包含以下代码。
$this->add(array(
'name' => 'imagepath',
'type' => 'File',
'options' => array ('label' => 'Picture',),
));
更新 Book.php
在书籍类中执行以下更改 – myapp/module/Tutorial/src/Model/Book.php。
部分代码清单如下 −
$file = new FileInput('imagepath');
$file->getValidatorChain()->attach(new UploadFile());
$file->getFilterChain()->attach(
new RenameUpload([
'target' => './public/tmpuploads/file',
'randomize' => true, 'use_upload_extension' => true
]));
$inputFilter->add($file);
array(1) {
["imagepath"] => array(5) {
["name"] => string "myimage.png"
["type"] => string "image/png"
["tmp_name"] => string
"public/tmpuploads/file_<random_string>.<image_ext>"
["error"] => int <error_number>
["size"] => int <size>
}
}
if(!empty($data['imagepath'])) {
if(is_array($data['imagepath'])) {
$this->imagepath = str_replace("./public", "", $data['imagepath']['tmp_name']);
} else {
$this->imagepath = $data['imagepath'];
}
} else {
$data['imagepath'] = null;
}
Book 模型的完整列表如下 ：
<?php
namespace Tutorial\Model;
use Zend\InputFilter\InputFilterInterface;
use Zend\InputFilter\InputFilterAwareInterface;
use Zend\Filter\File\RenameUpload;
use Zend\Validator\File\UploadFile;
use Zend\InputFilter\FileInput;
use Zend\InputFilter\InputFilter;
class Book implements InputFilterAwareInterface {
public $id;
public $author;
public $title;
public $imagepath;
protected $inputFilter;
public function setInputFilter(InputFilterInterface $inputFilter) {
throw new \Exception("Not used");
}
public function getInputFilter() {
if (!$this->inputFilter) {
$inputFilter = new InputFilter();
$inputFilter->add(array(
'name' => 'id',
'required' => true,
'filters' => array(
array('name' => 'Int'),
),
));
$inputFilter->add(array(
'name' => 'author',
'required' => true,
'filters' => array(
array('name' => 'StripTags'),
array('name' => 'StringTrim'),
),
'validators' => array(
array(
'name' => 'StringLength',
'options' => array(
'encoding' => 'UTF-8',
'min' => 1,
'max' => 100,
),
),
),
));
$inputFilter->add(array(
'name' => 'title',
'required' => true,
'filters' => array(
array('name' => 'StripTags'),
array('name' => 'StringTrim'),
),
'validators' => array(
array(
'name' => 'StringLength',
'options' => array(
'encoding' => 'UTF-8',
'min' => 1,
'max' => 100,
),
),
),
));
$file = new FileInput('imagepath');
$file->getValidatorChain()->attach(new UploadFile());
$file->getFilterChain()->attach(
new RenameUpload([
'target' => './public/tmpuploads/file',
'randomize' => true,
'use_upload_extension' => true
]));
$inputFilter->add($file);
$this->inputFilter = $inputFilter;
}
return $this->inputFilter;
}
public function exchangeArray($data) {
$this->id = (!empty($data['id'])) ? $data['id'] : null;
$this->author = (!empty($data['author'])) ? $data['author'] : null;
$this->title = (!empty($data['title'])) ? $data['title'] : null;
if(!empty($data['imagepath'])) {
if(is_array($data['imagepath'])) {
$this->imagepath = str_replace("./public", "",
$data['imagepath']['tmp_name']);
} else {
$this->imagepath = $data['imagepath'];
}
} else {
$data['imagepath'] = null;
}
}
}
更新 BookTable.php
我们更新了BookForm和Book 模型。现在，我们更新BookTable并修改了saveBook方法。这足以在数据数组中包含图像路径条目，$data。
部分代码清单如下 −
$data = array('author' => $book->author, 'title' => $book->title,
'imagepath' => $book->imagepath
);
BookTable 类的完整代码列表如下 ：
<?php
namespace Tutorial\Model;
use Zend\Db\TableGateway\TableGatewayInterface;
class BookTable {
protected $tableGateway;
public function __construct(TableGatewayInterface $tableGateway) {
$this->tableGateway = $tableGateway;
}
public function fetchAll() {
$resultSet = $this->tableGateway->select();
return $resultSet;
}
public function getBook($id) {
$id = (int) $id;
$rowset = $this->tableGateway->select(array('id' => $id));
$row = $rowset->current();
if (!$row) {
throw new \Exception("Could not find row $id");
}
return $row;
}
public function saveBook(Book $book) {
$data = array (
'author' => $book->author,
'title' => $book->title,
'imagepath' => $book->imagepath
);
$id = (int) $book->id;
if ($id == 0) {
$this->tableGateway->insert($data);
} else {
if ($this->getBook($id)) {
$this->tableGateway->update($data, array('id' => $id));
} else {
throw new \Exception('Book id does not exist');
}
}
}
}
更新 TutorialController.php 中的 addAction：文件上传信息将在 $_FILES 全局数组中可用，并且可以使用 Request 的 getFiles( ) 方法。 因此，合并发布的数据和文件上传信息，如下所示。
$post = array_merge_recursive(
$request->getPost()->toArray(),
$request->getFiles()->toArray()
);
The complete listing of the addAction() method is as follows −
public function addAction() {
$form = new BookForm();
$form->get('submit')->setValue('Add');
$request = $this->getRequest();
if ($request->isPost()) {
$book = new Book();
$form->setInputFilter($book->getInputFilter());
$post = array_merge_recursive(
$request->getPost()->toArray(),
$request->getFiles()->toArray()
);
$form->setData($post);
if ($form->isValid()) {
$book->exchangeArray($form->getData());
$this->bookTable->saveBook($book);
// Redirect to list of Tutorial
return $this->redirect()->toRoute('tutorial');
}
}
return array('form' => $form);
}
更新视图
最后，更改“add.phtml”并包含图像路径文件输入元素，如下所示 −
echo $this->formRow($form->get('imagepath'))."<br>";
完整列表如下 −
<?php
$title = 'Add new Book';
$this->headTitle($title);
?>
<h1><?php echo $this->escapeHtml($title); ?></h1>
<?php
if(!empty($form)) {
$form->setAttribute('action', $this->url('tutorial', array('action' => 'add')));
$form->prepare();
echo $this->form()->openTag($form);
echo $this->formHidden($form->get('id'));
echo $this->formRow($form->get('author'))."<br>";
echo $this->formRow($form->get('title'))."<br>";
echo $this->formRow($form->get('imagepath'))."<br>";
echo $this->formSubmit($form->get('submit'));
echo $this->form()->closeTag();
}
运行应用程序
最后，以 http://localhost:8080/tutorial/add 运行应用程序并添加新记录。
结果将如以下屏幕截图所示 -
表单页面
索引页
