45fan.com - 路饭网

搜索: 您的位置主页 > 电脑频道 > 编程代码 > 阅读资讯:PHP文件上传类实例的详细介绍

PHP文件上传类实例的详细介绍

2016-09-29 19:11:20 来源:www.45fan.com 【

PHP文件上传类实例的详细介绍

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

具体代码如下:

<?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!');
     }
    }
  }
 }
?>

其中,用到了一个静态工具类 Tool.class.php,代码如下:

Tool.class.php

<?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();
   } }
?>

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="?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>

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>

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

<?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!');
 }
?>

希望本文所述对大家PHP程序设计有所帮助。


本文地址:http://www.45fan.com/bcdm/76425.html
Tags: 文件 PHP 上传
编辑:路饭网
推广内容
推荐阅读
热门推荐
推荐文章
关于我们 | 联系我们 | 友情链接 | 网站地图 | Sitemap | App | 返回顶部