PHP实现的文件上传类与用法详解
本文实例讲述了PHP实现的文件上传类与用法。分享给大家供大家参考,具体如下:
FileUpload.class.php,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
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 publicfunctiongetPath(){ $_path=$_SERVER["SCRIPT_NAME"]; $_dir=dirname(dirname($_path)); if($_dir=='\\')$_dir='/'; $this->linkpath=$_dir.$this->linkpath; return$this->linkpath; } //移动文件 privatefunctionmoveUpload(){ 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 privatefunctionsetNewName(){ $_nameArr=explode('.',$this->name); $_postfix=$_nameArr[count($_nameArr)-1]; $_newname=date('YmdHis').mt_rand(100,1000).'.'.$_postfix; $this->linkpath=UPDIR.$this->linktotay.$_newname; return$this->today.$_newname; } //验证目录 privatefunctioncheckPath(){ if(!is_dir($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($this->today)){ Tool::alertBack('警告:子目录创建失败!'); } } } //验证类型 privatefunctioncheckType(){ if(!in_array($this->type,$this->typeArr)){ Tool::alertBack('警告:不合法的上传类型!'); } } //验证错误 privatefunctioncheckError(){ if(!empty($this->error)){ switch($this->error){ case1: Tool::alertBack('警告:上传值超过了约定最大值!'); break; case2: Tool::alertBack('警告:上传值超过了'.$this->maxsize.'KB!'); break; case3: Tool::alertBack('警告:只有部分文件被上传!'); break; case4: 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
alert('$_info');history.back();"; exit(); }//弹窗赋值关闭 staticpublicfunctionalertOpenerClose($_info,$_path){ echo"alert('$_info');"; echo" opener.document.content.thumbnail.value='$_path';"; echo" opener.document.content.pic.style.display='block';"; echo" opener.document.content.pic.src='$_path';"; echo" window.close();"; 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
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">http://www.w3.org/1999/xhtml"> main (*必须是jpg,gif,png,并且200k内)