PHP多文件上传案和MVC简单案例以及MVC的依赖注入和服务容器的原理和实现过程
16lz
2021-03-03
- 写一个实现的多文件上传案例，并将它封装成一个可复用的函数或类 2. 实例演示MVC与依赖注入的原理，以及服务容器对依赖对象的管理的实现过程。。。。
1. 多文件上传案例
文件夹结构
- upload.php
- common.php
- uploads
uplaod.php
<?phpprintf('<pre>%s</pre>', print_r($_FILES, true));if (count($_FILES) > 0) {include './common.php';switch ($_GET['t']) {case 'alone':echo upload($_FILES['file']);break;case 'onebyone':foreach ($_FILES as $file) {// echo $file['name'];echo upload($file);}break;case 'multipart':$files = [];foreach ($_FILES['file']['error'] as $key => $value) {$files[] = ['name' => $_FILES['file']['name'][$key],'type' => $_FILES['file']['type'][$key],'tmp_name' => $_FILES['file']['tmp_name'][$key],'error' => $_FILES['file']['error'][$key],'size' => $_FILES['file']['size'][$key],];}foreach ($files as $file) {// echo $file['name'];echo upload($file);}// var_dump($files);break;default:echo '未知错误';}}?><!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>图片上传</title><style>form {width: 20em;margin: 1em auto;}fieldset {margin: 1em;display: grid;place-content: flex-start;}button[type=button] {margin-bottom: .5em;}</style></head><body><form action="upload.php?t=alone" method="post" enctype="multipart/form-data"><fieldset><label>单文件上传</label><input type="hidden" name="MAX_FILE_SIZE" value="10485760"><input type="file" name="file"><button>upload</button></fieldset></form><form action="upload.php?t=onebyone" method="post" enctype="multipart/form-data"><fieldset><label>多文件上传: 逐个上传</label><input type="hidden" name="MAX_FILE_SIZE" value="10485760"><input type="file" name="file1"><button type="button" onclick="oneByOne()">继续添加文件</button><button>upload</button></fieldset></form><form action="upload.php?t=multipart" method="post" enctype="multipart/form-data"><fieldset><label>多文件上传: 一次性上传</label><input type="hidden" name="MAX_FILE_SIZE" value="10485760"><input type="file" name="file[]" multiple><button>upload</button></fieldset></form><script>let oneByOneFileNameIndex = 1;// 动态添加逐个上传的inputfunction oneByOne() {const dom = document.querySelector(`input[name=file${oneByOneFileNameIndex}]`);const input = document.createElement('input');input.type = 'file'input.name = 'file' + ++oneByOneFileNameIndex;dom.insertAdjacentElement('afterend', input);}</script></body></html>
common.php
<?php/*** 文件上传** @param array $files: 一个文件的所有数据* @return string*/function upload(array $files): string{// 获取文件名$name = $files['name'];// 获取临时文件的路径$tmpName = $files['tmp_name'];// 获取错误信息$error = $files['error'];if ($error === 0) {// 获取文件类型$type = strstr($files['type'], '/', true);// 获取文件后缀$ext = '.' . strtolower(pathinfo($files['name'], PATHINFO_EXTENSION));if ($type === 'image') {$path = "uploads/" . md5($name . date('Ymd') . str_pad(mt_rand(1, 9999), 5, '0', STR_PAD_LEFT)) . $ext;// 检测临时文件的合法性if (is_uploaded_file($tmpName)) {// 移动文件if (move_uploaded_file($tmpName, $path)) {// 返回成功return "<span><p style=\"color:green\">{$name}上传成功</p><img src='{$path}' width=250 alt='{$name}' /></span>";} else {return '移动文件失败';}} else {return '临时文件不合法';}} else {return '上传类型错误';}} else {return upload_error($error);}}/*** 文件上传的错误信息集合** @param int $errno: error代码* @return string*/function upload_error(int $errno): string{switch ($errno) {case 1:$msg = '超过的单文件大小';break;case 2:$msg = '超过前端表单限制';break;case 3:$msg = '上传文件不完整';break;case 4:$msg = '没有文件被上传';break;case 6:$msg = '找不到临时目录';break;case 7:$msg = '写入失败,目标目录无写入权限';break;default:exit('未定义错误');}return $msg;}
2.
MVC:M-模型(数据库相关的操作),V-视图(页面,html),C-控制器(功能:1.获取数据 2.选择视图)依赖注入: 简单那来说就是为了解决对象之间的耦合(`在一个类中调用其他类的实例`),例2.1:方法: 在类的外部实例化其他类, 然后以参数的方式传入.例:2.2:服务容器: 将外部依赖(需要引用的外部类实例)进行统一的管理.例2.3
2.1
<?phpnamespace test;require './Model.php';require './View.php';// 服务容器class Conn// 控制器class Controller{public function index(): string{return (new View())->fetch((new \test\Model())->select()['data']);}}
2.2
<?phpnamespace test;require './Model.php';require './View.php';// 控制器class Controller{// public function index(): string// {// return (new View())->fetch((new \test\Model())->select()['data']);// }protected $model;protected $view;public function __construct($model,$view) {$this->model = $model;$this->view = $view;}public function index(): string{return $this->view->fetch($this->model->select()['data']);}}$model = new Model();$view = new View();$controller = new Controller($model, $view);echo $controller->index();
2.3
<?phpnamespace test;require './Model.php';require './View.php';// 服务容器class Container{// 对象容器protected $instanles = [];// 写入对象public function bind($alias, \Closure $process){$this->instanles[$alias] = $process;;}// 取出对象public function make($alias, $params = []){return call_user_func_array($this->instanles[$alias], $params);}}// 控制器class Controller{/*服务容器*/public function index(Container $instanles){return $instanles->make('view')->fetch($instanles->make('model')->select()['data']);}}
3. MVC简单案例(数据来源: https://www.php.cn/blog/detail/26509.html)
文件夹结构
- Model.php
- View.php
- Controller.php
- index.php
Model.php
<?phpnamespace mvc_demo;use PDO;// 模型类class Model{// 获取数据public function getData(){$pdo = new PDO('mysql:dbname=phpedu', 'root', 'root');$stmt = $pdo->prepare('select * from staffs limit 10');$stmt->execute();return $stmt->fetchAll(PDO::FETCH_ASSOC);}}
View.php
<?phpnamespace mvc_demo;// 视图class View{// 数据展示public function fetch($data){$table = '<table border="1" cellspacing="0">';$table .= '<caption>员工信息表</caption><tr bgcolor="lightcyan"><th>id</th><td>姓名</td><td>性别</td><td>工资</td><td>邮箱</td><td>生日</td></tr>';foreach ($data as $staff) {$table .= '<tr>';$table .= '<td>' . $staff['sid'] . '</td>';$table .= '<td>' . $staff['name'] . '</td>';$table .= '<td>' . $staff['gender'] . '</td>';$table .= '<td>' . $staff['salary'] . '</td>';$table .= '<td>' . $staff['email'] . '</td>';$table .= '<td>' . $staff['birthday'] . '</td>';$table .= '</tr>';}$table .= '</table>';return $table;}}
Controller.php
<?phpnamespace test;require './Model.php';require './View.php';// 服务容器class Container{// 对象容器protected $instanles = [];// 写入对象public function bind($alias, \Closure $process){$this->instanles[$alias] = $process;;}// 取出对象public function make($alias, $params = []){return call_user_func_array($this->instanles[$alias], $params);}}// 控制器class Controller{// public function index(): string// {// return (new View())->fetch((new \test\Model())->select()['data']);// }/*依赖注入*/// protected $model;// protected $view;//// public function __construct($model, $view)// {// $this->model = $model;// $this->view = $view;// }//// public function index(): string// {// return $this->view->fetch($this->model->select()['data']);// }/*服务容器*/public function index(Container $instanles){return $instanles->make('view')->fetch($instanles->make('model')->select()['data']);}}
index.php
<?php/*服务容器*/require './Controller.php';$container = new \test\Container();$container->bind('model', function (){return new \test\Model();});$container->bind('view', function (){return new \test\View();});$table = new \test\Controller();?><!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><title>mvc</title></head><body><?php echo $table->index($container);?></body></html>
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