先来个简单的：
复制代码 代码如下:
//http://www.jb51.net
class upload{
public $length; //限定文件大小
public $file; //判断此类是用于图片上传还是文件上传
public $filename; //文件名
public $filetemp; //上传临时文件
public $filesize; //上传文件大小
public $error; //上传文件是否有错,php4没有
public $filetype; //上传文件类型
public $directory; //
public $maxlen;
public $errormsg;
function __construct($length,$file=true,$directory)
{
$this->maxlen=$length;
$this->length=$length*1024;
$this->file=$file; //true为一般文件，false为图片的判断
$this->directory=$directory;
}
public function uploadfile($filefield)
{
$this->filename=$filefield['name'];
$this->filetemp=$filefield['tmp_name'];
$this->error=$filefield['error'];
$this->filetype=$filefield['type'];
$this->filesize=$filefield['size'];
$pathsign = directory_separator; // /
if($this->file) //一般文件上传
{
$path = $this->_iscreateddir($this->directory);//取得路径
if($path)//http://www.jb51.net
{
$createfiletype = $this->_getfiletype($this->filename);//设置文件类别
$createfilename=uniqid(rand()); //随机产生文件名
$thisdir=$this->directory.$pathsign.$createfilename...$createfiletype;
if(@move_uploaded_file($this->filetemp,$thisdir)) //把临时文件移动到规定的路径下
{
return $thisdir;
}
}
}else{ //图片上传
$path = $this->_iscreateddir($this->directory);//取得路径
if($path)//路径存在//http://www.jb51.net
{
$createfiletype = $this->_getfiletype($this->filename);//设置文件类别
$createfilename=uniqid(rand());
return @move_uploaded_file($this->filetemp,$this->directory.$pathsign.$createfilename...$createfiletype) ? true : false;
}
}
}
public function _isbig($length,$fsize) //返回文件是否超过规定大小
{
return $fsize>$length ? true : false;
}
public function _getfiletype($filename) //获得文件的后缀
{
return end(explode(.,$filename));
}
public function _isimg($filetype) //上传图片类型是否允许
{
$type=array(jpeg,gif,jpg,bmp);
$filetype=strtolower($filetype);
$filearray=explode(/,$filetype);
$file_type=end($filearray);
return in_array($file_type,$type);//http://www.jb51.net
}
public function _iscreateddir($path) //路径是否存在，不存在就创建
{
if(!file_exists($path))
{
return @mkdir($path,0755)?true:false; //权限755//
}
else
{
return true;
}
}
public function showerror() //显示错误信息
{//http://www.jb51.net
echo \n;
exit();
}
}
class multiupload extends upload{
public $files;
function __construct($arrayfiles,$length,$file=true,$directory)
{
$this->files=$arrayfiles;
parent::__construct($length,$file,$directory);
}
function uploadmultifile()
{
$arr=array();
if($this->_judge()||$this->_judge()==no) //文件全部符合规格,就开始上传
{
foreach($this->files as $key=>$value)
{
$strdir=parent::uploadfile($this->files[$key]);
array_push($arr, $strdir);
}
//http://www.jb51.net
return $arr;
}else
{
return false;
}
}
function _judge()
{
if($this->file)
{
foreach($this->files as $key=>$value)
{
if($this->_isbig($this->length,$value['size']))
{
$this->errormsg=文件超过 $this->maxlen k;
parent::showerror();
}
if($value['error']=upload_err_no_file)
{
//$this->errormsg=上传文件出现错误;
//parent::showerror();
return no;
}
}
return true;
}else
{
//http://www.jb51.net
foreach($this->files as $key=>$value)
{
if($this->_isbig($this->length,$value['size']))
{
$this->errormsg=图片超过$this->maxlen;
parent::showerror();
}
if($value['error']!=0)
{
$this->errormsg=上传图片出现错误;
parent::showerror();
}
if(!$this->_isimg($value['type']))
{
$this->errormsg=图片格式不对;
parent::showerror();
}
}
return true;
}
}
}
?>
再来个复杂点的，可以自动生成缩略图的功能的php上传类
开始第一步：
创建文件夹，布局：
annex：附件（该目录下存放上传的原图片）
|— smallimg：存放缩略图片
|— mark：存放水印图片
include：存放类文件，字体（本程序代码使用的是：04b_08__.ttf）
|— upfile.php：集成简单上传，生成缩略图及水印的类文件信息
|— 04b_08__.ttf：字体文件
test.php：测试文件
第二步上传类
upfile.php
复制代码 代码如下:
annexfolder = $annexfolder;
$this->smallfolder = $smallfolder;
$this->fonttype = $includefolder./04b_08__.ttf;
}
function upload($inputname) {
$imagename = time();//设定当前时间为图片名称
if(@empty($_files[$inputname][name])) die(error(没有上传图片信息，请确认));
$name = explode(.,$_files[$inputname][name]);//将上传前的文件以“.”分开取得文件类型
$imgcount = count($name);//获得截取的数量
$imgtype = $name[$imgcount-1];//取得文件的类型
if(strpos($this->upfiletype,$imgtype) === false) die(error(上传文件类型仅支持 .$this->upfiletype. 不支持 .$imgtype));
$photo = $imagename...$imgtype;//写入数据库的文件名
$uploadfile = $this->annexfolder./.$photo;//上传后的文件名称
$upfileok = move_uploaded_file($_files[$inputname][tmp_name],$uploadfile);
if($upfileok) {
$imgsize = $_files[$inputname][size];
$ksize = round($imgsize/1024);
if($ksize > ($this->upfilemax*1024)) {
@unlink($uploadfile);
die(error(上传文件超过 .$this->upfilemax.kb));
}
} else {
die(error(上传图片失败，请确认你的上传文件不超过 $upfilemax kb 或上传时间超时));
}
return $photo;
}
function getinfo($photo) {
$photo = $this->annexfolder./.$photo;
$imageinfo = getimagesize($photo);
$imginfo[width] = $imageinfo[0];
$imginfo[height] = $imageinfo[1];
$imginfo[type] = $imageinfo[2];
$imginfo[name] = basename($photo);
return $imginfo;
}
function smallimg($photo,$width=128,$height=128) {
$imginfo = $this->getinfo($photo);
$photo = $this->annexfolder./.$photo;//获得图片源
$newname = substr($imginfo[name],0,strrpos($imginfo[name], .))._thumb.jpg;//新图片名称
if($imginfo[type] == 1) {
$img = imagecreatefromgif($photo);
} elseif($imginfo[type] == 2) {
$img = imagecreatefromjpeg($photo);
} elseif($imginfo[type] == 3) {
$img = imagecreatefrompng($photo);
} else {
$img = ;
}
if(empty($img)) return false;
$width = ($width > $imginfo[width]) ? $imginfo[width] : $width;
$height = ($height > $imginfo[height]) ? $imginfo[height] : $height;
$srcw = $imginfo[width];
$srch = $imginfo[height];
if ($srcw * $width > $srch * $height) {
$height = round($srch * $width / $srcw);
} else {
$width = round($srcw * $height / $srch);
}
if (function_exists(imagecreatetruecolor)) {
$newimg = imagecreatetruecolor($width, $height);
imagecopyresampled($newimg, $img, 0, 0, 0, 0, $width, $height, $imginfo[width], $imginfo[height]);
} else {
$newimg = imagecreate($width, $height);
imagecopyresized($newimg, $img, 0, 0, 0, 0, $width, $height, $imginfo[width], $imginfo[height]);
}
if ($this->tofile) {
if (file_exists($this->annexfolder./.$this->smallfolder./.$newname)) @unlink($this->annexfolder./.$this->smallfolder./.$newname);
imagejpeg($newimg,$this->annexfolder./.$this->smallfolder./.$newname);
return $this->annexfolder./.$this->smallfolder./.$newname;
} else {
imagejpeg($newimg);
}
imagedestroy($newimg);
imagedestroy($img);
return $newname;
}
function watermark($photo,$text) {
$imginfo = $this->getinfo($photo);
$photo = $this->annexfolder./.$photo;
$newname = substr($imginfo[name], 0, strrpos($imginfo[name], .)) . _mark.jpg;
switch ($imginfo[type]) {
case 1:
$img = imagecreatefromgif($photo);
break;
case 2:
$img = imagecreatefromjpeg($photo);
break;
case 3:
$img = imagecreatefrompng($photo);
break;
default:
return false;
}
if (empty($img)) return false;
$width = ($this->maxwidth > $imginfo[width]) ? $imginfo[width] : $this->maxwidth;
$height = ($this->maxheight > $imginfo[height]) ? $imginfo[height] : $this->maxheight;
$srcw = $imginfo[width];
$srch = $imginfo[height];
if ($srcw * $width > $srch * $height) {
$height = round($srch * $width / $srcw);
} else {
$width = round($srcw * $height / $srch);
}
if (function_exists(imagecreatetruecolor)) {
$newimg = imagecreatetruecolor($width, $height);
imagecopyresampled($newimg, $img, 0, 0, 0, 0, $width, $height, $imginfo[width], $imginfo[height]);
} else {
$newimg = imagecreate($width, $height);
imagecopyresized($newimg, $img, 0, 0, 0, 0, $width, $height, $imginfo[width], $imginfo[height]);
}
$white = imagecolorallocate($newimg, 255, 255, 255);
$black = imagecolorallocate($newimg, 0, 0, 0);
$alpha = imagecolorallocatealpha($newimg, 230, 230, 230, 40);
imagefilledrectangle($newimg, 0, $height-26, $width, $height, $alpha);
imagefilledrectangle($newimg, 13, $height-20, 15, $height-7, $black);
imagettftext($newimg, 4.9, 0, 20, $height-14, $black, $this->fonttype, $text[0]);
imagettftext($newimg, 4.9, 0, 20, $height-6, $black, $this->fonttype, $text[1]);
if($this->tofile) {
if (file_exists($this->annexfolder./.$this->markfolder./.$newname)) @unlink($this->annexfolder./.$this->markfolder./.$newname);
imagejpeg($newimg,$this->annexfolder./.$this->markfolder./.$newname);
return $this->annexfolder./.$this->markfolder./.$newname;
} else {
imagejpeg($newimg);
}
imagedestroy($newimg);
imagedestroy($img);
return $newname;
}
}
?>
第三步：测试上传类
test.php
复制代码 代码如下:
upload(upfile);
$img->maxwidth = $img->maxheight = 350;//设置生成水印图像值
$img->tofile = true;
$newsmallimg = $img->smallimg($photo);
$newmark = $img->watermark($photo,$text);
echo
;
echo
;
echo 继续上传;
} else {
?>
以上就介绍了图片上传网站 php 图片上传类代码，包括了图片上传网站方面的内容，希望对php教程有兴趣的朋友有所帮助。