PHP-简单分页和文件上传类

<?php
//为分页效果封装一个类
class Page{
public $total;
public $show;
public $pageNum;
public $curpage;
public $limitpage;
public $spot = '#name'; //刷新锚点设置
public function __construct($total,$show){
$this->total = $total; //记录条数
$this->show = $show; //显示数目,可更改
$this->pageNum = ceil($this->total/$this->show); //总页数
$this->curpage = empty($_GET['p'])?1:$_GET['p']; //当前页
$this->limitpage = ($this->curpage-1)*$this->show; //开始位置
if($this->curpage>$this->pageNum){
$this->curpage = $this->pageNum;
}
if($this->curpage<0){
$this->curpage == 1;
}
}
public function showPage(){
$pageData = "<li class='pbutton'>当前".$this->curpage."/".$this->pageNum."页  ";
$pageData .= "共有".$this->total."条记录</li>";
$pageData .= "<li class='pbutton'><a href='news.php?p=1".$this->spot."'>首页</a>";
if($this->curpage>1){
$pageData .= "<li class='pbutton'><a href='news.php?p=".($this->curpage-1).$this->spot."'>上一页</a>";
}
if($this->curpage<$this->pageNum){
$pageData .= "<li class='pbutton'><a href='news.php?p=".($this->curpage+1).$this->spot."'>下一页</a>";
}
$pageData .= "<li class='pbutton'><a href='news.php?p=".$this->pageNum.$this->spot."'>尾页</a></li>";
$pageData .= "<form method='get' action=''><input type='text' style='width:30px;height:20px;text-align:center;' name='p' value='$this->curpage'>
<button type='submit'>跳转</button></form>";
return $pageData;
}
}

<?php

//开始封装一个用来文件上传类，以功能为导向开始逻辑思考;
class Upload{
protected $fileName;    //上传的文件file名称
protected $maxSize;        //预备的最大文件体积
protected $allowExt;   //允许的文件上传类型
protected $uploadPath; //预设的文件上传目录
protected $imgFlag;        //是否是真实的图片类型
protected $error;      //存放错误类型，用于调用报错
protected $ext;            //当前的文件扩展名
protected $uniName;        //产生唯一的字符串文件名
protected $destination;    //最后的上传文件地址，用于以后的数据库存储或调用
protected $fileInfo;    //上传的具体FILES信息

//构造函数,先初始化好需要的属性(变量);
public function __construct($fileName,$maxSize=8,$imgFlag=true,$allowExt=array('.jpeg','.jpg','.gif','.png'),$uploadPath='./uploads'){
$this->fileName = $fileName;
$this->maxSize = $maxSize*1024*1024;
$this->allowExt = $allowExt;
$this->imgFlag = $imgFlag;
$this->uploadPath = $uploadPath;
$this->fileInfo = $_FILES[$this->fileName];
}
//匹配错误信息
public function checkError(){
if(!empty($this->fileInfo)){
if($this->fileInfo['error']>0){
switch($this->fileInfo['error']){
case 1:
$this->error = '上传文件超过了PHP配置文件中upload_max_filesize选项的值';
break;
case 2:
$this->error = '超过了表单MAX_FILE_SIZE限制的大小';
break;
case 3:
$this->error = '文件部分被上传';
break;
case 4:
$this->error = '没有选择上传文件';
break;
case 6:
$this->error = '没有找到临时目录';
break;
case 7:
case 8:
$this->error = '系统错误';
break;
}
return false;
}else{
return true;
}
}else{
$this->error = '文件上传失败!';
return false;
}
}
//检测上传文件大小
public function checkSize(){
if($this->fileInfo['size']>$this->maxSize){
$this->error = '上传文件过大!';
return false;
}else{
return true;
}
}
//检测上传文件的扩展名
public function checkExt(){
$this->ext = strrchr($this->fileInfo['name'],".");
if(!in_array($this->ext, $this->allowExt)){
$this->error = '不允许的文件类型!';
return false;
}else{
return true;
}
}
//检测是否是真实的图片类型
public function checkTrueImg(){
if($this->imgFlag){
if(!@getimagesize($this->fileInfo['tmp_name'])){
$this->error = '不是真实的图片类型!';
return false;
}else{
return true;
}
}
}
//显示错误
public function showError(){
exit("<span style='color:#d00;'>".$this->error."</span>");
}
//检测目录是否存在
public function checkUploadPath(){
if(!file_exists($this->uploadPath)){
mkdir($this->uploadPath,0777,true);
chmod($this->uploadPath,0777);
}
}
//产生唯一字符串文件名
public function getuniName(){
return md5(uniqid(microtime(true),true));
}
//开始上传文件
public function uploadFile(){
if($this->checkError()&&$this->checkSize()&&$this->checkExt()&&$this->checkTrueImg()){
$this->checkUploadPath();
$this->uniName = $this->getuniName();
$this->destination = $this->uploadPath."/".date('Y-m-d').$this->uniName.$this->ext;
if(move_uploaded_file($this->fileInfo['tmp_name'], $this->destination)){
return $this->destination;
}else{
$this->error = '文件移动失败!';
$this->showError();
}
}else{
$this->showError();
}
}

}