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)