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Correction status：qualified
Teacher's comments：现在还在补这个作业呀, 赶紧跟上来
Collection
Collection
写一个自定义异常类来处理上传过程以及各种错误
新建一个index.html文件，用于文件的上传页面
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> </head> <body> <form action="upload.php" method="POST" enctype="multipart/form-data"> <input type="file" name="my_file" id=""> <button>上传</button> </form> </body> </html>
此处注意：提交类型必需选择POST方式。
新建一个upload.php文件处理文件的上传。
<?php
namespace _001;
use Exception;
class UpException extends Exception{
public function __construct($message = "", $code = 0)
{
parent::__construct($message, $code);
}
public function errorInfo(){
return <<< "ERROR"
<h2>
{$this->getCode()}:{$this->getMessage()}
</h2>
ERROR;
}
}
try{
//第一步：配置上传信息
//文件原始名称
$fileName = $_FILES['my_file']['name'];
//文件临时名称
$tempFile = $_FILES['my_file']['tmp_name'];
//允许上传的文件类型
$fileType = ['jpg','png','jpeg','gif'];
//允许上传的文件大小
$fileSize = 3145728;
//上传到服务器的指定目录
$filePath = '/Uploads/';
//第二步：查看是否上传成功
$uploadError = $_FILES['my_file']['error'];
if($uploadError > 0){
switch ($uploadError){
case 1:throw new UpException('超过php.in配置中文件上传的最大长度',101);
case 2:throw new UpException('超过允许上传文件的最大长度',102);
case 3:throw new UpException('文件只有部分被上传',103);
case 4:throw new UpException('没有文件被上传',104);
case 6:throw new UpException('找不到临时上传文件夹',106);
case 7:throw new UpException('文件写入失败',107);
}
}
//第三步：检查文件的扩展名是否正确
$extension = explode('.',$fileName)[1];
if(!in_array($extension,$fileType)){
throw new UpException('上传的文件类型:'.$extension.'不被允许',110);
}
//第四步：重命名文件名称防止重名
$fileName=date('YmdHis',time()).md5(round(1,99)).'.'.$extension;
//第五步：把文件储存到指定位置
if(is_uploaded_file($tempFile)){
if(move_uploaded_file($tempFile,__DIR__.$filePath.$fileName)){
echo '<script>alert("上传成功");history.back();</script>';
}else{
throw new UpException('文件无法移动到指定的目录，请检查目录的权限',111);
}
}else{
throw new UpException('非法操作',444);
}
}
catch (UpException $e){
echo $e->errorInfo();
}2. (选做) 写一个与指定数据表绑定的类, 实现基本的模型功能,例如查询, 新增, 更新,删除等操作
<?php
namespace _002;
use PDO;
class Staff
{
private $staff_id;
private $name;
private $age;
private $sex;
private $position;
private $mobile;
private $hiredate;
//属性重载
public function __get($name)
{
return $this->$name;
}
public function __set($name, $value)
{
$this->$name = $value;
}
//构造方法
public function __construct()
{
$this->hiredate = date('Y/m/d', $this->hiredate);
$this->sex = $this->sex ? '男' : '女';
}
}
$pdo=new PDO('mysql:dbname=staff','root','root');
//查询数据
$stmt=$pdo->prepare('SELECT * FROM `staff`');
//数据表和类进行绑定
$stmt->setFetchMode(PDO::FETCH_CLASS,Staff::class);
$stmt->execute();
while($staff = $stmt->fetch()){
echo "<li>{$staff->staff_id}: {$staff->name}--{$staff->sex}--{$staff->hiredate}</li>";
}
//增加数据
$stmt=$pdo->prepare("INSERT INTO `staff` (name,age,sex,position,mobile,hiredate) VALUES ('张三',18,1,'厕所管理员','13908145589','1420041450')");
//数据表和类进行绑定
$stmt->setFetchMode(PDO::FETCH_CLASS,Staff::class);
$stmt->execute();
echo '新增'.$stmt->rowcount().'条数据';
//修改数据
$stmt=$pdo->prepare('UPDATE `staff` SET sex=0 WHERE staff_id=1');
//数据表和类进行绑定
$stmt->setFetchMode(PDO::FETCH_CLASS,Staff::class);
$stmt->execute();
echo '更新'.$stmt->rowcount().'条数据';
//删除数据
$stmt=$pdo->prepare('DELETE FROM `staff` WHERE staff_id=21');
//数据表和类进行绑定
$stmt->setFetchMode(PDO::FETCH_CLASS,Staff::class);
$stmt->execute();
echo '删除'.$stmt->rowcount().'条数据';