php 图片上传类代码

　　先来个简单的：
复制代码 代码如下:
<?
////
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)////
{
$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////
{
$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);////
}
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
{////
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);
}
////
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)
{
//$this->errormsg=上传文件出现错误;
//parent::showError();
return no;
}
}
return true;
}else
{
////
foreach($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:
<?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;
}
}
?>

第三步：测试上传类
test.php
复制代码 代码如下:
<?php
$annexFolder = annex;
$smallFolder = smallimg;
$markFolder = mark;
$includeFolder = include;
require(./.$includeFolder./upfile.php);
$img = new UPImages($annexFolder,$smallFolder,$includeFolder);
$text = array(
if(@$_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
}
?>