PHP文件上传类实例详解
发布:smiling 来源: PHP粉丝网 添加日期:2021-07-27 11:21:42 浏览: 评论:0
这篇文章主要介绍了PHP文件上传类,结合实例形式详细分析了PHP上传文件类的实现代码与相关使用技巧,需要的朋友可以参考下。
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 (!emptyempty($this->error)) {
- switch ($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!');
- }
- ?>
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