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php上传图片类及用法示例_PHP

May 27, 2016 am 10:34 AM
php usage

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

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<&#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=\"{$this- alt="php上传图片类及用法示例_PHP" >ph_name}\" width=\"{$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;>

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2.html页面:

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<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>

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3.调用类的文件名为:upphoto.php

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<&#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' / alt="php上传图片类及用法示例_PHP" >";

&#63;>

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更多关于PHP相关内容感兴趣的读者可查看本站专题:《php文件操作总结》、《PHP运算与运算符用法总结》、《PHP网络编程技巧总结》、《PHP基本语法入门教程》、《php操作office文档技巧总结(包括word,excel,access,ppt)》、《php日期与时间用法总结》、《php面向对象程序设计入门教程》、《php字符串(string)用法总结》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》

希望本文所述对大家PHP程序设计有所帮助。

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