PHP文件上传类实例详解
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2023-12-18 13:45:40
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...
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!'); } ?>
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