php 图片上传类代码

<?
////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)////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////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);////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
{////www.jb51.net
echo "<script language ='javascript'>\n history.back();\n alert(' $this->errormsg');\n </script> \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);
}
////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)
{
//$this->errormsg="上传文件出现错误";
//parent::showerror();
return "no";
}
}
return true;
}else
{
////www.jb51.net
foreach($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;
}
}
}
?>

<?php
class upimages {
var $annexfolder = "annex";//附件存放点，默认为：annex
var $smallfolder = "smallimg";//缩略图存放路径，注：必须是放在 $annexfolder下的子目录，默认为：smallimg
var $markfolder = "mark";//水印图片存放处
var $upfiletype = "jpg gif png";//上传的类型，默认为：jpg gif png rar zip
var $upfilemax = 1024;//上传大小限制，单位是“kb”，默认为：1024kb
var $fonttype;//字体
var $maxwidth = 500; //图片最大宽度
var $maxheight = 600; //图片最大高度
function upimages($annexfolder,$smallfolder,$includefolder) {
$this->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;
}
}
?>

<?php
$annexfolder = "annex";
$smallfolder = "smallimg";
$markfolder = "mark";
$includefolder = "include";
require("./".$includefolder."/upfile.php");
$img = new upimages($annexfolder,$smallfolder,$includefolder);
$text = array("www.jb51.net","all rights reserved");
if(@$_get["go"]) {
$photo = $img->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,$text);
echo "<img src='".$newsmallimg."' border='0'><br><br>";
echo "<img src='".$newmark."' border='0'><br><br>";
echo "<a href='./test.php'>继续上传</a>";
} else {
?>
<form method="post" action="./test.php?go=go" enctype="multipart/form-data">
<input type="file" name="upfile"><br><br>
<input type="submit" value="上传">
</form>
<?php
}
?>