Detailed explanation of PHP file upload class examples, _PHP tutorial

WBOY
Release: 2016-07-12 08:54:27
Original
882 people have browsed it

PHP文件上传类实例详解,

本文实例讲述了PHP文件上传类。分享给大家供大家参考,具体如下:

这里演示了FileUpload.class.php文件上传类,其中用到了两个常量,可在网站配置文件中定义:

define('ROOT_PATH',dirname(__FILE__)); //网站根目录
define('UPDIR','/uploads/'); //上传主目录

Copy after login

具体代码如下:

<&#63;php
  //上传文件类
  class FileUpload {
    private $error;  //错误代码
    private $maxsize; //表单最大值
    private $type;  //类型
    private $typeArr = array('image/jpeg','image/pjpeg','image/png','image/x-png','image/gif'); //类型合集
    private $path;  //目录路径
    private $today;  //今天目录
    private $name;  //文件名
    private $tmp;  //临时文件
    private $linkpath; //链接路径
    private $linktotay; //今天目录(相对)
    //构造方法,初始化
    public function __construct($_file,$_maxsize) {
       $this->error = $_FILES[$_file]['error'];
       $this->maxsize = $_maxsize / 1024;
       $this->type = $_FILES[$_file]['type'];
       $this->path = ROOT_PATH.UPDIR;
       $this->linktotay = date('Ymd').'/';
       $this->today = $this->path.$this->linktotay;
       $this->name = $_FILES[$_file]['name'];
       $this->tmp = $_FILES[$_file]['tmp_name'];
       $this->checkError();
       $this->checkType();
       $this->checkPath();
       $this->moveUpload();
    }
    //返回路径
    public function getPath() {
       $_path = $_SERVER["SCRIPT_NAME"];
       $_dir = dirname(dirname($_path));
       if ($_dir == '\\') $_dir = '/';
       $this->linkpath = $_dir.$this->linkpath;
       return $this->linkpath;
    }
    //移动文件
    private function moveUpload() {
       if (is_uploaded_file($this->tmp)) {
         if (!move_uploaded_file($this->tmp,$this->setNewName())) {
            Tool::alertBack('警告:上传失败!');
         }
       } else {
         Tool::alertBack('警告:临时文件不存在!');
       }
    }
    //设置新文件名
    private function setNewName() {
       $_nameArr = explode('.',$this->name);
       $_postfix = $_nameArr[count($_nameArr)-1];
       $_newname = date('YmdHis').mt_rand(100,1000).'.'.$_postfix;
       $this->linkpath = UPDIR.$this->linktotay.$_newname;
       return $this->today.$_newname;
    }
    //验证目录
    private function checkPath() {
       if (!is_dir($this->path) || !is_writeable($this->path)) {
         if (!mkdir($this->path)) {
            Tool::alertBack('警告:主目录创建失败!');
         }
       }
       if (!is_dir($this->today) || !is_writeable($this->today)) {
         if (!mkdir($this->today)) {
            Tool::alertBack('警告:子目录创建失败!');
         }
       }
    }
    //验证类型
    private function checkType() {
       if (!in_array($this->type,$this->typeArr)) {
         Tool::alertBack('警告:不合法的上传类型!');
       }
    }
    //验证错误
    private function checkError() {
       if (!empty($this->error)) {
         switch ($this->error) {
            case 1 :
              Tool::alertBack('警告:上传值超过了约定最大值!');
              break;
            case 2 :
              Tool::alertBack('警告:上传值超过了'.$this->maxsize.'KB!');
              break;
            case 3 :
              Tool::alertBack('警告:只有部分文件被上传!');
              break;
            case 4 :
              Tool::alertBack('警告:没有任何文件被上传!');
              break;
            default:
              Tool::alertBack('警告:未知错误!');
         }
       }
    }
  }
&#63;>

Copy after login

其中,用到了一个静态工具类 Tool.class.php,代码如下:

Tool.class.php

<&#63;php
  class Tool {
     //弹窗返回
     static public function alertBack($_info) {
       echo "<script type='text/javascript'>alert('$_info');history.back();</script>";
       exit();
     }     //弹窗赋值关闭
     static public function alertOpenerClose($_info,$_path) {
       echo "<script type='text/javascript'>alert('$_info');</script>";
       echo "<script type='text/javascript'>opener.document.content.thumbnail.value='$_path';</script>";
       echo "<script type='text/javascript'>opener.document.content.pic.style.display='block';</script>";
       echo "<script type='text/javascript'>opener.document.content.pic.src='$_path';</script>";
       echo "<script type='text/javascript'>window.close();</script>";
       exit();
     } }
&#63;>

Copy after login

下面进行一个实例演示,请看下面的步骤:

1、先创建一个 index.php 页面,做一个表单

index.php

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
  <head>
     <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
     <title>main</title>
  </head>
  <body>
     <form name="content" method="post" action="&#63;action=add">
     <input type="text" name="thumbnail" class="text" readonly="readonly" /> <input type="button" value="上传" onclick="centerWindow('./upfile.html','upfile','400','100')" /> <img name="pic" style="display:none;" /> ( * 必须是jpg,gif,png,并且200k内) <br />
     </form>
  </body>
</html>

Copy after login

2、创建 upfile.html 文件,建立表单提交到 upload.php

upfile.html

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>上传图片</title>
  </head>
  <body></p><p>   <form method="post" action="./upload.php" enctype="multipart/form-data" style="text-align:center;margin:30px;">
    <input type="hidden" name="MAX_FILE_SIZE" value="204800" />
    <input type="file" name="pic" />
    <input type="submit" name="send" value="确定上传" />
</form></p><p></body>
</html>

Copy after login

3、通过 upload.php 文件调用文件上传类实现上传,并且把路径赋给 input 标签和显示图片

<&#63;php
  require 'FileUpload.class.php';
  if (isset($_POST['send'])) {
    $_fileupload = new FileUpload('pic',$_POST['MAX_FILE_SIZE']);
    $_path = $_fileupload->getPath();
    Tool::alertOpenerClose('文件上传成功!',$_path);
  } else {
    Tool::alertBack('警告:文件过大或者其他未知错误导致浏览器崩溃!');
  }
&#63;>

Copy after login

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。

您可能感兴趣的文章:

  • 适用于初学者的简易PHP文件上传类
  • 一个完整的php文件上传类实例讲解
  • PHP多文件上传类实例
  • php判断文件上传类型及过滤不安全数据的方法
  • php可生成缩略图的文件上传类实例
  • 一个经典的PHP文件上传类分享
  • php 文件上传类代码
  • PHP5+UTF8多文件上传类

www.bkjia.comtruehttp://www.bkjia.com/PHPjc/1119982.htmlTechArticlePHP文件上传类实例详解, 本文实例讲述了PHP文件上传类。分享给大家供大家参考,具体如下: 这里演示了FileUpload.class.php文件上传类,其中...
Related labels:
php
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn:Public welfare online PHP training,Help PHP learners grow quickly!