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Powerful php file upload class

高洛峰
高洛峰Original
2016-12-22 15:45:191297browse

The example in this article shares the PHP file upload class for everyone. It is very powerful and is for your reference. The specific content is as follows

<?PHP
/*
*文件上传类
**/
class upfile{
private $file_size;//上传源文件大小
private $file_tem;//上传文件临时储存名
private $file_name;//上传文件名
private $file_type;//上传文件类型
private $file_max_size=2000000;//允许文件上传最大
private $file_folder="uploadFiles";//文件上传路径
private $over_write=false;//是否覆盖同名文件
//允许上传图片的类型
private $allow_type=array(&#39;image/jpg&#39;,&#39;image/jpeg&#39;,&#39;image/png&#39;,&#39;image/pjpeg&#39;,&#39;image/gif&#39;,&#39;image/bmp&#39;,&#39;image/x-png&#39;);
 
 
//构造类,file:上传文件域
function __construct($file){
$this->file_name=$_FILES[$file][&#39;name&#39;];//客户端原文件名
$this->file_type=$_FILES[$file][&#39;type&#39;];//文件类型
$this->file_tem=$_FILES[$file][&#39;tmp_name&#39;];//储存的临时文件名,一般是系统默认
$this->file_size=$_FILES[$file][&#39;size&#39;];//文件大小
}
 
//如果文件夹不存在则创建文件夹 
function creatFolder($f_path){
if(!file_exists($f_path)){
mkdir($f_path,0777);
}
}
 
//判断文件是不是超过上传限制
function is_big(){
if($this->file_size>$this->file_max_size){
echo "文件太大,超过限制!";
exit;
}
}
 
//检查文件类型
function check_type(){
if(!in_array($this->file_type,$this->allow_type)){
echo "上传文件类型不正确";
exit;
}
}
 
//检查文件是否存在
function check_file_name(){
if(!file_exists($this->file_tem)){
echo "上传文件不存在";
exit;
}          
}
 
//检查是否有同名文件,是否覆盖
function check_same_file($filename){
if(file_exists($filename)&&$this->over_write!=true){
echo "同名文件已存在!";
exit;
}    
}
 
//移动文件
function move_file($filename,$destination){
if(!move_uploaded_file($filename,$destination)){
echo "移动文件出错";
exit;
}
}
 
//检查文件是否是通过 HTTP POST 上传的
function is_upload_file(){
if(!is_uploaded_file($this->file_tem)){
echo "文件不存在";
exit;
}
}
 
//获得文件后缀名
function getext(){
$ext=$this->file_name;
$extstr=explode(&#39;.&#39;,$ext);
$count=count($extstr)-1;
return $extstr[$count];
}
 
//新建文件名
function set_name(){      
return time().".".$this->getext();
}
 
//建立以年月日为文件夹名
function creat_mulu(){
$this->creatFolder("../../upload/".date(Ymd));  
return "upload/".date(Ymd);
}
 
//生成的文件名
function files_name(){
$name=$this->set_name();
$folder=$this->creat_mulu();
return "../../".$folder."/".$name;
}
 
//上传文件
function upload_file(){
$f_name=$this->files_name();
move_uploaded_file($this->file_tem,$f_name);
return $f_name;
}  
 
//生成缩略图
//最大宽:120,高:120
function create_simg($img_w,$img_h){
$name=$this->set_name();
$folder=$this->creat_mulu();
$new_name="../../".$folder."/s_".$name;      
$imgsize=getimagesize($this->files_name());
 
switch ($imgsize[2]){
case 1:
if(!function_exists("imagecreatefromgif")){
echo "你的GD库不能使用GIF格式的图片,请使用Jpeg或PNG格式!返回";
exit();
}
$im = imagecreatefromgif($this->files_name());
break;
case 2:
if(!function_exists("imagecreatefromjpeg")){
echo "你的GD库不能使用jpeg格式的图片,请使用其它格式的图片!返回";
exit();
}
$im = imagecreatefromjpeg($this->files_name());
break;
case 3:
$im = imagecreatefrompng($this->files_name());
break;
case 4:
$im = imagecreatefromwbmp($this->files_name());
break;
default:
die("is not filetype right");
exit;
}
 
$src_w=imagesx($im);//获得图像宽度
$src_h=imagesy($im);//获得图像高度
$new_wh=($img_w/$img_h);//新图像宽与高的比值
$src_wh=($src_w/$src_h);//原图像宽与高的比值
if($new_wh<=$src_wh){
$f_w=$img_w;
$f_h=$f_w*($src_h/$src_w);
}else{
$f_h=$img_h;
$f_w=$f_h*($src_w/$src_h);
}
if($src_w>$img_w||$src_h>$img_h){      
if(function_exists("imagecreatetruecolor")){//检查函数是否已定义
$new_img=imagecreatetruecolor($f_w,$f_h);
if($new_img){
imagecopyresampled($new_img,$im,0,0,0,0,$f_w,$f_h,$src_w,$src_h);//重采样拷贝部分图像并调整大小
}else{
$new_img=imagecreate($f_w,$f_h);
imagecopyresized($new_img,$im,0,0,0,0,$f_w,$f_h,$src_w,$src_h);
}
}else{
$$new_img=imagecreate($f_w,$f_h);
imagecopyresized($new_img,$im,0,0,0,0,$f_w,$f_h,$src_w,$src_h);
}
if(function_exists(&#39;imagejpeg&#39;)){
imagejpeg($new_img,$new_name);
}else{
imagepng($new_img,$new_name);
}
imagedestroy($new_img);
}
//imagedestroy($new_img);
return $new_name;
}    
 
}
?>

The above is the entire content of this article. I hope it will be helpful to everyone's learning. I also hope that everyone will support the PHP Chinese website. .

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