php上传图片类及用法示例
这篇文章主要介绍了php上传图片类及用法,结合完整实例形式分析了php上传图片功能类及其具体使用方法,需要的朋友可以参考下。
本文实例讲述了php上传图片类及用法,分享给大家供大家参考,具体如下:
1.类文件名为:upclass.php
- <?php
- class upclass{
- public $previewsize=0.125 ; //预览图片比例
- public $preview=0; //是否生成预览,是为1,否为0
- public $datetime; //随机数
- public $ph_name; //上传图片文件名
- public $ph_tmp_name; //图片临时文件名
- public $ph_path="./userimg/"; //上传文件存放路径
- public $ph_type; //图片类型
- public $ph_size; //图片大小
- public $imgsize; //上传图片尺寸,用于判断显示比例
- public $al_ph_type=array('image/jpg','image/jpeg','image/png','image/pjpeg','image/gif','image/bmp','image/x-png'); //允许上传图片类型
- public $al_ph_size=1000000; //允许上传文件大小
- function __construct(){
- $this->set_datatime();
- }
- function set_datatime(){
- $this->datetime=date("YmdHis");
- }
- //获取文件类型
- function get_ph_type($phtype){
- $this->ph_type=$phtype;
- }
- //获取文件大小
- function get_ph_size($phsize){
- $this->ph_size=$phsize."<br>";
- }
- //获取上传临时文件名
- function get_ph_tmpname($tmp_name){
- $this->ph_tmp_name=$tmp_name;
- $this->imgsize=getimagesize($tmp_name);
- }
- //获取原文件名
- function get_ph_name($phname){
- $this->ph_name=$this->ph_path.$this->datetime.strrchr($phname,"."); //strrchr获取文件的点最后一次出现的位置
- //$this->ph_name=$this->datetime.strrchr($phname,"."); //strrchr获取文件的点最后一次出现的位置
- return $this->ph_name;
- }
- // 判断上传文件存放目录
- function check_path(){
- if(!file_exists($this->ph_path)){
- mkdir($this->ph_path);
- }
- }
- //判断上传文件是否超过允许大小
- function check_size(){
- if($this->ph_size>$this->al_ph_size){
- $this->showerror("上传图片超过2000KB");
- }
- }
- //判断文件类型
- function check_type(){
- if(!in_array($this->ph_type,$this->al_ph_type)){
- $this->showerror("上传图片类型错误");
- }
- }
- //上传图片
- function up_photo(){
- if(!move_uploaded_file($this->ph_tmp_name,$this->ph_name)){
- $this->showerror("上传文件出错");
- }
- }
- //图片预览
- function showphoto(){
- if($this->preview==1){
- if($this->imgsize[0]>2000){
- $this->imgsize[0]=$this->imgsize[0]*$this->previewsize;
- $this->imgsize[1]=$this->imgsize[1]*$this->previewsize;
- }
- echo("<img src=\"{$this->ph_name}\" width=\"{$this->imgsize['0']}\" height=\"{$this->imgsize['1']}\">");
- }
- }
- //错误提示
- function showerror($errorstr){
- echo "<script language=javascript>alert('$errorstr');location='javascript:history.go(-1)';</script>";
- exit();
- }
- function save(){
- $this->check_path();
- $this->check_size();
- $this->check_type();
- $this->up_photo();
- $this->showphoto();
- }
- }
- ?>
2.html页面:
- <form action="upphoto.php" method="post" enctype="multipart/form-data">
- 图片来源:<input type="file" name="photo" >
- <input type="submit" name="submit" value="上传">
- </form>
3.调用类的文件名为:upphoto.php
- <?php
- header("Content-Type:text/html; charset=utf-8");
- //类的实例化:
- include("upclass.php");//类的文件名是upoop.php
- $up=new upclass();
- $submit=$_POST['submit'];
- if($submit=="上传"){
- $up->get_ph_tmpname($_FILES['photo']['tmp_name']);
- $up->get_ph_type($_FILES['photo']['type']);
- $up->get_ph_size($_FILES['photo']['size']);
- $up->get_ph_name($_FILES['photo']['name']);
- $up->save();
- }
- ?>
- <?php
- $images=$up->get_ph_name($_FILES['photo']['name']);
- echo "<img src='$images' />";
- ?>