Powerful php file upload class
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 $allow_type=array('image/jpg','image/jpeg','image/png','image/pjpeg','image/gif','image/bmp','image/x-png');
//构造类，file:上传文件域
function __construct($file){
$this->file_name=$_FILES[$file]['name'];//客户端原文件名
$this->file_type=$_FILES[$file]['type'];//文件类型
$this->file_tem=$_FILES[$file]['tmp_name'];//储存的临时文件名，一般是系统默认
$this->file_size=$_FILES[$file]['size'];//文件大小
}
//如果文件夹不存在则创建文件夹
function creatFolder($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;
$extstr=explode('.',$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('imagejpeg')){
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. .
For more powerful PHP file upload related articles, please pay attention to the PHP Chinese website!
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