超级好用的一个php上传图片类(随机名，缩略图，加水印)

　　Upimages.class.php php上传类
复制代码 代码如下:
<?php
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;
}
}
?>

使用方法
复制代码 代码如下:
include Upimages.class.php;
$max=upload; //文件上传路径
$mix=small; //缩略图路径（必须在upload下建立）
$mark=mark; //加水引的图片存放路径
$text = array(oktang,2012); //水印内容
$img= new UpImages($max,$mix,$max); //实例化类文件
$photo = $img->upLoad(file); //上传的文件域
$img->maxWidth = $img->maxHeight = 600; //设置高，和宽
$img->toFile = true;
$newSmallImg = $img->smallImg($photo);
$newMark = $img->waterMark($photo,$text);
echo $newSmallImg;
echo $newMark;
echo <img src=.$newSmallImg. border=0><br><br>;
echo <img src=.$newMark. border=0><br><br>;

注意里面有个字体文件，大家可以从网上下载。