实例
MyException.php
<?php
namespace _0808;
use Exception;
use Throwable;
class MyException extends Exception{
public function __construct($message = "", $code = 0, Throwable $previous = null)
{
parent::__construct($message, $code, $previous);
}
//自定义错误信息的输出样式
public function errorInfo(){
return <<< ERROR
<h2>
<strong>{$this->getCode()}</strong>
<span style='color:red'>{$this->getMessage()}</span>
</h2>
ERROR;
;
}
}运行实例 »
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实例
upload.php
<?php
namespace _0808;
require 'MyException.php';
try{
$upload = new UpLoad();
$upload->uploadFile('pic');
echo $upload->errorInfo;
}catch(MyException $exception){
echo $exception->errorInfo();
}
class UpLoad{
//文件上传路径
protected $path = '/uploads/';
//允许文件上传的后缀
protected $allowSuffix = ['jpg','jpeg',
'gif','wbmp','png'];
//mime类型
protected $allowMime =['image/jpg','image/jpeg',
'image/gif','image/wbmp','image/png'];
//允许上传的大小
protected $maxSize = 3145728;
//是否启用默认的前缀
protected $isRandName =true ;
//文件的前缀
protected $prefix = 'up_';
//错误号和错误信息
protected $errorNumber;
protected $errorInfo;
//文件的信息
//文件名
protected $oldName;
//文件的后缀
protected $suffix;
//文件的大小
protected $size;
//文件的mime
protected $mime;
//文件的临时文件的路径
protected $tmpName;
//文件新名字
protected $newName;
//构造方法
//因为成员属性比较多就用数组来显示
public function __construct($arr =[]){
foreach ($arr as $key=>$value){
$this->setOption($key,$value);
}
}
//判断$key是不是我的成员属性，如果是就设置
protected function setOption($key,$value){
//得到所有的成员属性
$keys = array_keys(get_class_vars(__CLASS__));
if(in_array($key, $keys)){
$this->$key = $value;
}
}
//文件上传函数
//key 就是input框中的name属性值
public function uploadFile($key){
//判断有没有设置路径 path
if(empty($this->path)){
$this->setOption('errorNumber',-1 );
return false;
}
//判断该路径是否存在是否可写
if (!$this->check()){
$this->setOption('errorNumber', -2);
return false;
}
//判断$_FILES里面的error信息是否为0，如果为0则说明文件信息在服务器端可以直接获取，提取信息保存到成员属性中
$error = $_FILES[$key]['error'];
if($error){
$this->setOption('errorNumber', -3);
return false;
}else {
//提取文件相关信息并且保存到成员属性中
$this->getFileInfo($key);
}
//判断文件的大小、mime、后缀是否符合
if(!$this->checkSize() || !$this->checkMime()|| !$this->checkSuffix()){
return false;
}
//得到新的文件名字
$this->newName = $this->createNewName();
//判断是否是上传文件，并且是移动上传文件
if(is_uploaded_file($this->tmpName)){
if(move_uploaded_file($this->tmpName, $this->path.$this->newName)){
return $this->path.$this->newName;
}else {
$this->setOption('errorNumber', -7);
return false;
}
}else{
$this->setOption('errorNumber', -6);
return false;
}
}
//检测文件夹是否存在，是否可写
protected function check(){
//文件夹不存在或者不是目录。创建文件夹
if(!file_exists($this->path) ||!is_dir($this->path)){
return mkdir($this->path,0777,true);
}
//判断文件是否可写
if(!is_writeable($this->path)){
return chmod($this->path, 0777);
}
return true;
}
//根据key得到文件信息
protected function getFileInfo($key){
//得到文件的名字
$this->oldName = $_FILES[$key]['name'];
//得到文件的mime类型
$this->mime = $_FILES[$key]['type'];
//得到文件的临时文件
$this->tmpName = $_FILES[$key]['tmp_name'];
//得到文件大小
$this->size = $_FILES[$key]['size'];
//得到文件后缀
$this->suffix = pathinfo($this->oldName)['extension'];
}
//判断文件大小
protected function checkSize(){
if($this->size > $this->maxSize){
$this->setOption('errorNumber', -3);
return false;
}
return true;
}
//判断mime类型
protected function checkMime(){
if(!in_array($this->mime, $this->allowMime)){
$this->setOption('errorNumber', -4);
return false;
}
return true;
}
//判断后缀
protected function checkSuffix(){
if(!in_array($this->suffix, $this->allowSuffix)){
$this->setOption('errorNumber', -5);
return false;
}
return true;
}
//创建新名字
protected function createNewName(){
if($this->isRandName){
$name = $this->prefix.uniqid().'.'.$this->suffix;
}else {
$name = $this->prefix.$this->oldName;
}
return $name;
}
public function __get($name){
if($name == 'errorNumber'){
return $this->errorNumber;
}elseif ($name == 'errorInfo'){
return $this->getErrorInfo();
}
}
protected function getErrorInfo(){
switch ($this->errorNumber){
case 0:
$str = '上传成功';
break;
case -1:
$str = '文件路径没有设置';
break;
case -2:
$str = '文件不是目录或者不可写';
break;
case -3:
$str = '文件超过指定大小';
break;
case -4:
$str = 'mime类型不符合';
break;
case -5:
$str = '文件后缀不符合';
break;
case -6:
$str = '不是上传文件';
break;
case -7:
$str = '移动失败';
break;
case 1:
$str = '超出ini设置大小';
break;
case 2:
$str = '超出html表单大小';
break;
case 3:
$str = '文章只有部分上传';
break;
case 4:
$str = '没有文件上传';
break;
case 6:
$str = '找不到临时文件';
break;
case 7:
$str = '文件写入失败';
break;
}
if($this->errorNumber!==0){
throw new MyException($str,-1);
}else{
return $str;
}
}
}运行实例 »
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实例
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>上传文件</title> </head> <body> <form action="upload.php" method="post" enctype="multipart/form-data"> <input type="file" name="pic" id=""> <input type="hidden" name="MAX_FILE_SIZE" value=""> <input type="submit" value="上传"> </form> </body> </html>
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