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PHP文件上传类实例详解

2020-03-24 18:56:46
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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.html' target='_blank'>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: //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'.$this- maxsize.'KB!'); break; case 3 : Tool::alertBack('警告:只有部分文件被上传!'); break; case 4 : Tool::alertBack('警告:没有任何文件被上传!'); break; default: Tool::alertBack('警告:未知错误!');
static public function alertBack($_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" readonly="readonly" / input type="button" value="上传" / img name="pic" / ( * 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.phpupfile.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" 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 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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