PHP upload image class and usage examples, _PHP tutorial

php upload image class and usage examples,

This article describes the php upload image class and usage examples. Share it with everyone for your reference, the details are as follows:

1. The class file name is: upclass.php

<&#63;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();
 }
}
&#63;>

2.html page:

<form action="upphoto.php" method="post" enctype="multipart/form-data">
图片来源：<input type="file" name="photo" id="photo">
<input type="submit" name="submit" value="上传">
</form>

3. The file name of the calling class is: upphoto.php

<&#63;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();
}
&#63;>
<&#63;php
$images=$up->get_ph_name($_FILES['photo']['name']);
 echo "<img src='$images' />";
&#63;>

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