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php多图上传插件（最简单的上传php文件）
2022-02-23 16:55  浏览:2

第一步：生成文件上传类

class FileUpload {

private $filepath; // 上传文件的目的路径

private $allowtype = array(‘jpg’,’gif’,’png’); //充许上传文件的类型,使用小字母

private $maxsize = 1000000; //允许文件上传的最大长度1m

private $israndname = true; //是否随机重命名 false为不随机

private $originName; //源文件名

private $tmpFileName; //临时文件名

private $fileType; //文件类型(文件后缀)

private $fileSize; //文件大小

private $newFileName; //新文件名

private $errorNum = 0; //错误号

private $errorMess=””; //错误报告消息

function __construct($options=array()) {

foreach ($options as $key=>$val) {

$key=strtolower($key); //在为成员属性设置值时，不区分大小写

if (!in_array($key,get_class_vars(get_class($this))))

continue;

$this->setOption($key, $val);

}

}

function uploadFile($fileField) {

$return=true;

if(!$this->checkFilePath()) {//检查文件路径

$this->errorMess=$this->getError();

return false;

}

$name=$_FILES[$fileField][‘name’];

$tmp_name=$_FILES[$fileField][‘tmp_name’];

$size=$_FILES[$fileField][‘size’];

$error=$_FILES[$fileField][‘error’];

if(is_Array($name)){ //如果是多个文件上传则$file[“name”]会是一个数组

$errors=array();

for($i = 0; $i < count($name); $i++){

if($this->setFiles($name[$i],$tmp_name[$i],$size[$i],$error[$i] )) {//设置文件信息

if(!$this->checkFileSize() || !$this->checkFileType()){

$errors[]=$this->getError();

$return=false;

}

}else{

$errors[]=$this->getError();

$return=false;

}

if(!$return) // 如果有问题，则重新初使化属性

$this->setFiles();

}

if($return){

$fileNames=array(); //存放所有上传后文件名的变量数组

for($i = 0; $i < count($name); $i++){

if($this->setFiles($name[$i],$tmp_name[$i],$size[$i],$error[$i] )) {//设置文件信息

$this->setNewFileName(); //设置新文件名

if(!$this->copyFile()){

$errors[]=$this->getError();

$return=false;

}

$fileNames[]=$this->newFileName;

}

}

$this->newFileName=$fileNames;

}

$this->errorMess=$errors;

return $return;

} else {

if($this->setFiles($name,$tmp_name,$size,$error)) {//设置文件信息

if($this->checkFileSize() && $this->checkFileType()){

$this->setNewFileName(); //设置新文件名

if($this->copyFile()){ //上传文件 返回0为成功， 小于0都为错误

return true;

}else{

echo ‘3333333333333’;

$return=false;

}

}else{

$return=false;

}

} else {

$return=false;

}

if(!$return)

$this->errorMess=$this->getError();

return $return;

}

}

public function getNewFileName(){

return $this->newFileName;

}

public function getErrorMsg(){

return $this->errorMess;

}

private function getError() {

$str = “上传文件<font color=’red’>{$this->originName}</font>时出错 : “;

switch ($this->errorNum) {

case 4: $str .= “没有文件被上传”; break;

case 3: $str .= “文件只有部分被上传”; break;

case 2: $str .= “上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值”; break;

case 1: $str .= “上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值”; break;

case -1: $str .= “未允许类型”; break;

case -2: $str .= “文件过大,上传的文件不能超过{$this->maxsize}个字节”; break;

case -3: $str .= “上传失败”; break;

case -4: $str .= “建立存放上传文件目录失败，请重新指定上传目录”; break;

case -5: $str .= “必须指定上传文件的路径”; break;

default: $str .= “未知错误”;

}

return $str.'<br>’;

}

//设置和$_FILES有关的内容

private function setFiles($name=””, $tmp_name=””, $size=0, $error=0) {

$this->setOption(‘errorNum’, $error);

if($error)

return false;

$this->setOption(‘originName’, $name);

$this->setOption(‘tmpFileName’,$tmp_name);

$aryStr = explode(“.”, $name);

$this->setOption(‘fileType’, strtolower($aryStr[count($aryStr)-1]));

$this->setOption(‘fileSize’, $size);

return true;

}

//为单个成员属性设置值

private function setOption($key, $val) {

$this->$key = $val;

}

//设置上传后的文件名称

private function setNewFileName() {

if ($this->israndname) {

$this->setOption(‘newFileName’, $this->proRandName());

} else{

$this->setOption(‘newFileName’, $this->originName);

}

}

//检查上传的文件是否是合法的类型

private function checkFileType() {

if (in_array(strtolower($this->fileType), $this->allowtype)) {

return true;

}else {

$this->setOption(‘errorNum’, -1);

return false;

}

}

//检查上传的文件是否是允许的大小

private function checkFileSize() {

if ($this->fileSize > $this->maxsize) {

$this->setOption(‘errorNum’, -2);

return false;

}else{

return true;

}

}

//检查是否有存放上传文件的目录

private function checkFilePath() {

if(empty($this->filepath)){

$this->setOption(‘errorNum’, -5);

return false;

}

if (!file_exists($this->filepath) || !is_writable($this->filepath)) {

if (!@mkdir($this->filepath, 0755)) {

$this->setOption(‘errorNum’, -4);

return false;

}

}

return true;

}

//设置随机文件名

private function proRandName() {

$fileName=date(‘YmdHis’).”_”.rand(100,999); //获取随机文件名

return $fileName.’.’.$this->fileType; //返回文件名加原扩展名

}

//复制上传文件到指定的位置

private function copyFile() {

if(!$this->errorNum) {

$filepath = rtrim($this->filepath, ‘/’).’/’;

$filepath .= $this->newFileName;

if (@move_uploaded_file($this->tmpFileName, $filepath)) {

return true;

}else{

$this->setOption(‘errorNum’, -3);

return false;

}

} else {

return false;

}

}

}

第二步：生成图像处理类

class Image {

private $path;

//构造方法用来对图片所在位置进行初使化

function __construct($path=”./”){

$this->path=rtrim($path, “/”).”/”;

}

function thumb($name, $width, $height, $qz=”th_”){

//获取图片信息

$imgInfo=$this->getInfo($name); //图片的宽度，高度，类型

//获取图片资源, 各种类型的图片都可以创建资源 jpg, gif, png

$srcImg=$this->getImg($name, $imgInfo);

//获取计算图片等比例之后的大小, $size[“width”], $size[“height”]

$size=$this->getNewSize($name, $width, $height, $imgInfo);

//获取新的图片资源, 处理一下gif透明背景

$newImg=$this->kidOfImage($srcImg, $size, $imgInfo);

//另存为一个新的图片，返回新的缩放后的图片名称

return $this->createNewImage($newImg, $qz.$name, $imgInfo);

}

private function createNewImage($newImg, $newName, $imgInfo){

switch($imgInfo[“type”]){

case 1://gif

$result=imageGif($newImg, $this->path.$newName);

break;

case 2://jpg

$result=imageJPEG($newImg, $this->path.$newName);

break;

case 3://png

$return=imagepng($newImg, $this->path.$newName);

break;

}

imagedestroy($newImg);

return $newName;

}

private function kidOfImage($srcImg, $size, $imgInfo){

$newImg=imagecreatetruecolor($size[“width”], $size[“height”]);

$otsc=imagecolortransparent($srcImg);

if($otsc >=0 && $otsc <= imagecolorstotal($srcImg)){

$tran=imagecolorsforindex($srcImg, $otsc);

$newt=imagecolorallocate($newImg, $tran[“red”], $tran[“green”], $tran[“blue”]);

imagefill($newImg, 0, 0, $newt);

imagecolortransparent($newImg, $newt);

}

imagecopyresized($newImg, $srcImg, 0, 0, 0, 0, $size[“width”], $size[“height”], $imgInfo[“width”], $imgInfo[“height”]);

imagedestroy($srcImg);

return $newImg;

}

private function getNewSize($name, $width, $height, $imgInfo){

$size[“width”]=$imgInfo[“width”];

$size[“height”]=$imgInfo[“height”];

//缩放的宽度如果比原图小才重新设置宽度

if($width < $imgInfo[“width”]){

$size[“width”]=$width;

}

//缩放的高度如果比原图小才重新设置高度

if($height < $imgInfo[“height”]){

$size[“height”]=$height;

}

//图片等比例缩放的算法

if($imgInfo[“width”]*$size[“width”] > $imgInfo[“height”] * $size[“height”]){

$size[“height”]=round($imgInfo[“height”]*$size[“width”]/$imgInfo[“width”]);

}else{

$size[“width”]=round($imgInfo[“width”]*$size[“height”]/$imgInfo[“height”]);

}

return $size;

}

private function getInfo($name){

$data=getImageSize($this->path.$name);

$imageInfo[“width”]=$data[0];

$imageInfo[“height”]=$data[1];

$imageInfo[“type”]=$data[2];

return $imageInfo;

}

private function getImg($name, $imgInfo){

$srcPic=$this->path.$name;

switch($imgInfo[“type”]){

case 1: //gif

$img=imagecreatefromgif($srcPic);

break;

case 2: //jpg

$img=imageCreatefromjpeg($srcPic);

break;

case 3: //png

$img=imageCreatefrompng($srcPic);

break;

default:

return false;

}

return $img;

}

function waterMark($groundName, $waterName, $waterPos=0, $qz=”wa_”){

if(file_exists($this->path.$groundName) && file_exists($this->path.$waterName)){

$groundInfo=$this->getInfo($groundName);

$waterInfo=$this->getInfo($waterName);

//水印的位置

if(!$pos=$this->position($groundInfo, $waterInfo, $waterPos)){

echo “水印不应该比背景图片小！”;

return;

}

$groundImg=$this->getImg($groundName, $groundInfo);

$waterImg=$this->getImg($waterName, $waterInfo);

$groundImg=$this->copyImage($groundImg, $waterImg, $pos, $waterInfo);

return $this->createNewImage($groundImg, $qz.$groundName, $groundInfo);

}else{

echo “图片或水印图片不存在”;

return false;

}

}

private function copyImage($groundImg, $waterImg, $pos, $waterInfo){

imagecopy($groundImg, $waterImg, $pos[“posX”], $pos[“posY”], 0, 0, $waterInfo[“width”], $waterInfo[“height”]);

imagedestroy($waterImg);

return $groundImg;

}

private function position($groundInfo, $waterInfo, $waterPos){

//需要背景比水印图片大

if(($groundInfo[“width”]< $waterInfo[“width”]) ||($groundInfo[“height”] < $waterInfo[“height”])){

return false;

}

switch($waterPos){

case 1:

$posX=0;

$posY=0;

break;

case 2:

$posX=($groundInfo[“width”]-$waterInfo[“width”])/2;

$posY=0;

break;

case 3:

$posX=$groundInfo[“width”]-$waterInfo[“width”];

$posY=0;

break;

case 4:

$posX=0;

$posY=($groundInfo[“height”]-$waterInfo[“height”]) /2;

break;

case 5:

$posX=($groundInfo[“width”]-$waterInfo[“width”])/2;

$posY=($groundInfo[“height”]-$waterInfo[“height”]) /2;

break;

case 6:

$posX=$groundInfo[“width”]-$waterInfo[“width”];

$posY=($groundInfo[“height”]-$waterInfo[“height”]) /2;

break;

case 7:

$posX=0;

$posY=$groundInfo[“height”]-$waterInfo[“height”];

break;

case 8:

$posX=($groundInfo[“width”]-$waterInfo[“width”])/2;

$posY=$groundInfo[“height”]-$waterInfo[“height”];

break;

case 9:

$posX=$groundInfo[“width”]-$waterInfo[“width”];

$posY=$groundInfo[“height”]-$waterInfo[“height”];

break;

case 0:

default:

$posX=rand(0, ($groundInfo[“width”]-$waterInfo[“width”]));

$posY=rand(0, ($groundInfo[“height”]-$waterInfo[“height”]));

break;

}

return array(“posX”=>$posX, “posY”=>$posY);

}

}

第三步：上传表单

<form action=”upload.php” method=”post” enctype=”multipart/form-data”>

pic: <input type=”file” name=”pic”><br>

<input type=”submit” name=”sub” value=”uploadpicture”>

</form>

第四步：上传处理

<?php

include “FileUpload.class.php”;

include “image.class.php”;

$up=new FileUpload(array(“filepath”=>”./images/”, “allowtype”=>array(“gif”, “jpg”, “png”)));

if($up->uploadFile(“pic”)){

$filename=$up->getNewFileName();

$img=new Image(“./images/”);

$th_filename=$img->thumb($filename, 300, 300, “th_”);

$img->waterMark($th_filename, “gaolf.gif”, 5, “wa_”);

$img->waterMark($filename, “gaolf.gif”, 0, “”);

}else{

echo $up->getErrorMsg();

}

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