php图片上传类同时可生成缩略图与加水印

php图片上传类同时可生成缩略图与加水印 这款图片上传代码可以把上传的图片增加水印，生成小图片，同时还可以生成文字水印。

php教程图片上传类同时可生成缩略图与加水印
这款图片上传代码可以把上传的图片增加水印，生成小图片，同时还可以生成文字水印。

class upimages {         var $annexfolder = "upload";//附件存放点，默认为：annex         var $smallfolder = "small";//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("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;//写入数据库教程的文件名                 $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;         } }