PHP上传文件类的实现代码与相关使用技巧

时间：2016-04-12 10:00:04 来源：ucbug下载站作者：ucbug下载站

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：

1 2	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">

<head>

</head>

<body>

<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