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Correction status：qualified
Teacher's comments：写得不错.思路很清楚
Collection
Collection
将课堂中的文件上传案例中的错误信息, 全部采用自定义的异常类抛出
1、文件上传html页面 index.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>上传文件</title> </head> <body> <form action="my_work.php" method="post" enctype="multipart/form-data"> <!--设置上传文件大小最大为3M 这段代码一定要放到文件提交框之前--> <!-- 1M = 1024K = 1024*1024Byte=1048576Byte--> <input type="hidden" name="MAX_FILE_SIZE" value="3145728"> <input type="file" name="my_file" id=""> <!--button默认为提交按钮--> <button>上传</button> </form> </body> </html>
点击 "运行实例" 按钮查看在线实例
2、自定义异常类 CustomException.php
<?php
// 自定义异常类
class CustomException extends Exception
{
public function errorInfo()
{
$str="<h3>
<strong>错误代码：{$this->getCode()} --- </strong>
<span style='color: red'>{$this->getMessage()}</span>
</h3>";
return $str;
}
}点击 "运行实例" 按钮查看在线实例
3、文件上传类 FileUpload.php
<?php
require 'CustomException.php';
class FileUpload
{
public $flie;
// 原始文件名称
protected $fileName;
// 临时文件名
protected $fileTmpName;
//文件类型
protected $fileType;
//文件错误代码
protected $fileError;
//文件大小
protected $fileSize;
//文件保存路径
protected $savePath;
//保存的文件名
protected $saveFileName;
// 允许上传的文件后缀
protected $allowExts=['jpg','jpeg','png','gif'];
public function __construct($file,$savePath='')
{
$this->file=$file;
$this->fileName=$file['name'];
$this->fileTmpName=$file['tmp_name'];
$this->fileType=$file['type'];
$this->fileError=$file['error'];
$this->fileSize=$file['size'];
$this->savePath=$savePath;
if (!file_exists($savePath)){
mkdir($savePath,0777,true);//创建多级目录
}
}
public function __get($name)
{
return $this->$name;
}
public function __set($name, $value)
{
$this->$name=$value;
}
//文件上传
public function upload()
{
// 判断是否上传成功
$this->getFileError();
//判断文件后缀名是否符合要求
$extension=$this->getExtension();
$this->saveFileName=date('YmdHis',time()).mt_rand(1,99).'.'.$extension;
if(is_uploaded_file($this->fileTmpName)){
if (move_uploaded_file($this->fileTmpName,$this->savePath.$this->saveFileName)){
echo '<script>alert("上传成功");history.back();</script>';
}else{
throw new CustomException('文件无法移动到指定目录, 请检查目录的写权限',103);
}
}else{
throw new CustomException('非法操作',102);
}
}
//判断是否上传成功
protected function getFileError()
{
if($this->fileError>0){
switch ($this->fileError){
case 1:
throw new CustomException('上传的文件超过了 php.ini 中 upload_max_filesize选项限制的值。',1);
case 2:
throw new CustomException('上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值。上传文件不允许超过3M',2);
case 3:
throw new CustomException('文件只有部分被上传。上传文件不完整',3);
case 4:
throw new CustomException('没有文件被上传',4);
case 6:
throw new CustomException('找不到临时文件夹',6);
case 7:
throw new CustomException('文件写入失败',7);
default:
throw new CustomException('未知错误',8);
}
}
}
//判断文件后缀名是否符合要求
protected function getExtension()
{
$myfile=explode('.',$this->fileName);
$extension=array_pop($myfile);
if(!in_array($extension,$this->allowExts)){
throw new CustomException('不允许上传'.$extension.'文件类型',101);
}
return $extension;
}
}点击 "运行实例" 按钮查看在线实例
4、文件上传调用 my_work.php
<?php
require 'FileUpload.php';
try{
$obj=new FileUpload($_FILES['my_file'],'uploads/img/');
$obj->upload();
}catch (CustomException $e){
echo $e->errorInfo();
}点击 "运行实例" 按钮查看在线实例
