后端图片上传

发布时间：2023-09-06 01:38责任编辑：沈小雨关键词：后端

用到的是simpleUpload.js需要依赖jquery.js、layer.js

js代码：

注意：由于需要对文本与的内容经行改变，所以必须采用onchange函数,而不是onclick函数

下面是后端控制器处理：
//上传文件
public function upload(){
if(!empty($_FILES)) {
???????????//如果有文件上传上传附件
???????????$this->_upload();
???????}
}

//处理上传文件
protected function _upload() ?
???{
???????import("@.ORG.Net.UploadFile");
???????$upload = new UploadFile();
$catalog = toDate(time(),"Ym");
$sServerDir = C("savePath");

if(!file_exists($sServerDir)){mkdir($sServerDir);}

$sServerDir = C("savePath").$catalog."/";
if(!file_exists($sServerDir)){mkdir($sServerDir);}

???????$upload->maxSize ?= C("maxSize");
???????$upload->allowExts ?= explode(‘,‘,C("allowExts"));
$upload->allowTypes = explode(‘,‘,C("allowTypes"));
???????$upload->savePath = ?C("savePath").$catalog."/";
$upload->saveRule = md5(rand(0,10).time().get_client_ip());

//判断是否生成缩微图
if(intval($_REQUEST["filew"]) > 10 && intval($_REQUEST["fileh"]) > 10){
//取得文件宽度
$w = intval($_REQUEST["filew"]);

//取得文件高度
$h = intval($_REQUEST["fileh"]);

$upload->thumb = true;
$upload->thumbSuffix = "";
$upload->thumbMaxWidth = $w;
$upload->thumbMaxHeight = $h;
$upload->thumbCompel = true;
}

???????//执行上传操作
???????if(!$upload->upload()) {

// 上传失败
$uploadSuccess = ?0;
$ajaxMsg ?= ?$upload->getErrorMsg();
???????}else{
// 上传成功
$uploadSuccess = ?1;
// 取得上传返回信息
$server = $upload->getUploadFileInfo();
???????}

???????// 判断是否有Ajax方式上传附件
???????// 并且设置了结果显示Html元素
if(strlen(C("sa_path"))>2){
$style_path= C("sa_path");
}else{
$style_path= "/";
}
??????// 装载数组
$info = Array();
$info[‘status‘]= $uploadSuccess;
$info[‘info‘]= $ajaxMsg;
$info[‘path‘]= $style_path.$server[0][‘savepath‘].$server[0][‘savename‘];

header("Content-Type: application/json; charset=utf-8");
echo json_encode($info);

???}

效果图：

整体流程图：

批量上传的其实与单图上传一样，唯一区别在前端js的处理上不太一样，单图上传成功显示的是一张图片，多图上传上传成功显示多张图片而已。只需要在显示区里调用append函数累计显示多张图片就行了。

差点忘还有thinkphp自带的文件上传类

<?php
// +----------------------------------------------------------------------
// | ThinkPHP ????????????????????????????????????????????????????????????
// +----------------------------------------------------------------------
// | Copyright (c) 2008 http://thinkphp.cn All rights reserved. ?????
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com> ?????????????????????????????????
// +----------------------------------------------------------------------
// $Id$

/**
+------------------------------------------------------------------------------
* 文件上传类
+------------------------------------------------------------------------------
* @category ??ORG
* @package ?ORG
* @subpackage ?Net
* @author ???liu21st <liu21st@gmail.com>
* @version ??$Id$
+------------------------------------------------------------------------------
*/
class UploadFile extends Think
{//类定义开始

???// 上传文件的最大值
???public $maxSize = -1;

???// 是否支持多文件上传
???public $supportMulti = true;

???// 允许上传的文件后缀
// ?留空不作后缀检查
???public $allowExts = array();

???// 允许上传的文件类型
// 留空不做检查
???public $allowTypes = array();

// 使用对上传图片进行缩略图处理
???public $thumb ??= ?false;
// 缩略图最大宽度
???public $thumbMaxWidth;
// 缩略图最大高度
???public $thumbMaxHeight;
// 缩略图后缀
???public $thumbSuffix ??= ?‘_thumb‘;
// 缩略图背景颜色填充修改
public $thumbCompel=false;
// 压缩图片文件上传
public $zipImages = false;

???// 上传文件保存路径
???public $savePath = ‘‘;

// 存在同名是否覆盖
public $uploadReplace = false;

???// 上传文件命名规则
???// 例如可以是 time uniqid com_create_guid 等
???// 必须是一个无需任何参数的函数名可以使用自定义函数
???public $saveRule = ‘‘;

???// 上传文件Hash规则函数名
???// 例如可以是 md5_file sha1_file 等
???public $hashType = ‘md5_file‘;

???// 错误信息
???private $error = ‘‘;

???// 上传成功的文件信息
???private $uploadFileInfo ;

???/**
????+----------------------------------------------------------
????* 架构函数
????+----------------------------------------------------------
????* @access public
????+----------------------------------------------------------
????*/
???public function __construct($maxSize=‘‘,$allowExts=‘‘,$allowTypes=‘‘,$savePath=UPLOAD_PATH,$saveRule=‘‘)
???{
???????if(!empty($maxSize) && is_numeric($maxSize)) {
???????????$this->maxSize = $maxSize;
???????}
???????if(!empty($allowExts)) {
???????????if(is_array($allowExts)) {
???????????$this->allowExts = array_map(‘strtolower‘,$allowExts);
???????????}else {
???????????$this->allowExts = explode(‘,‘,strtolower($allowExts));
???????????}
???????}
???????if(!empty($allowTypes)) {
???????????if(is_array($allowTypes)) {
???????????$this->allowTypes = array_map(‘strtolower‘,$allowTypes);
???????????}else {
???????????$this->allowTypes = explode(‘,‘,strtolower($allowTypes));
???????????}
???????}
???????if(!empty($saveRule)) {
???????????$this->saveRule = $saveRule;
???????}else{
$this->saveRule=C(‘UPLOAD_FILE_RULE‘);
}
???????$this->savePath = $savePath;
???}

???/**
????+----------------------------------------------------------
????* 上传一个文件
????+----------------------------------------------------------
????* @access private
????+----------------------------------------------------------
????* @param mixed $name 数据
????* @param string $value ?数据表名
????+----------------------------------------------------------
????* @return string
????+----------------------------------------------------------
????* @throws ThinkExecption
????+----------------------------------------------------------
????*/
???private function save($file)
???{
???????$filename = $file[‘savepath‘].$file[‘savename‘];
if(!$this->uploadReplace && file_exists($filename)) {
// 不覆盖同名文件
$this->error=‘文件已经存在！‘.$filename;
return false;
}
???????if(!move_uploaded_file($file[‘tmp_name‘], $filename)) {
$this->error = ‘文件上传保存错误！‘;
???????????return false;
???????}
???????if($this->thumb) {
???????// 生成图像缩略图
???????????import("@.ORG.Util.Image");
???????????$image = ?Image::getImageInfo($filename);
???????????if(false !== $image) {
???????????//是图像文件生成缩略图
???????????????$thumbWidth = explode(‘,‘,$this->thumbMaxWidth);
???????????????$thumbHeight ??= ?explode(‘,‘,$this->thumbMaxHeight);
???????????????$thumbSuffix = explode(‘,‘,$this->thumbSuffix);
$thumbCompel = $this->thumbCompel;
???????????????for($i=0,$len=count($thumbWidth); $i<$len; $i++) {
???????????????????$thumbname = Image::thumb($filename,‘‘,‘‘,$thumbWidth[$i],$thumbHeight[$i],true,$thumbSuffix[$i],$thumbCompel); ???????????????
???????????????}
???????????}
???????}
if($this->zipImags) {
// TODO 对图片压缩包在线解压

}
???????return true;
???}

???/**
????+----------------------------------------------------------
????* 上传文件
????+----------------------------------------------------------
????* @access public
????+----------------------------------------------------------
????* @param string $savePath ?上传文件保存路径
????+----------------------------------------------------------
????* @return string
????+----------------------------------------------------------
????* @throws ThinkExecption
????+----------------------------------------------------------
????*/
???public function upload($savePath =‘‘)
???{
???????//如果不指定保存文件名，则由系统默认
???????if(empty($savepath)) {
???????????$savePath = $this->savePath;
???????}
???????// 检查上传目录
???????if(!is_dir($savePath)) {
// 检查目录是否编码后的
if(is_dir(base64_decode($savePath))) {
$savePath=base64_decode($savePath);
}else{
$this->error ?= ?‘上传目录‘.$savePath.‘不存在‘;
return false;
}
???????}else {
???????if(!is_writeable($savePath)) {
???????????????$this->error ?= ?‘上传目录‘.$savePath.‘不可写‘;
???????????????return false; ???????
???????}
???????}
???????$fileInfo = array();
???????$isUpload ??= false;

// 获取上传的文件信息
// 对$_FILES数组信息处理
$files = $this->dealFiles($_FILES);
???????foreach($files as $key => $file) {
???????????//过滤无效的上传
???????????if(!empty($file[‘name‘])) {
???????????????//登记上传文件的扩展信息
???????????????$file[‘extension‘] ?= $this->getExt($file[‘name‘]);
???????????????$file[‘savepath‘] ??= $savePath;
???????????????$file[‘savename‘] ??= $this->getSaveName($file);
???????????????if($file[‘error‘]!== 0) {
???????????????????//文件上传失败
???????????????????//捕获错误代码
???????????????????$this->error($file[‘error‘]);
???????????????????return false;
???????????????}
???????????????//文件上传成功，进行自定义规则检查

???????????????//检查文件大小
???????????????if(!$this->checkSize($file[‘size‘])) {
???????????????????$this->error = ‘上传文件大小不符！‘;
???????????????????return false;
???????????????}

???????????????//检查文件Mime类型
???????????????if(!$this->checkType($file[‘type‘])) {
???????????????????$this->error = ‘上传文件MIME类型不允许！‘;
???????????????????return false;
???????????????}
???????????????//检查文件类型
???????????????if(!$this->checkExt($file[‘extension‘])) {
???????????????????$this->error = ‘上传文件类型不允许‘;
???????????????????return false;
???????????????}

???????????????//检查是否合法上传
???????????????if(!$this->checkUpload($file[‘tmp_name‘])) {
???????????????????$this->error = ‘非法上传文件！‘;
???????????????????return false;
???????????????}

???????????????//保存上传文件
???????????????if(!$this->save($file)) {
???????????????????//$this->error = $file[‘error‘];
???????????????????return false;
???????????????}
???????????????if(function_exists($this->hashType)) {
???????????????????$fun = ?$this->hashType;
???????????????????$file[‘hash‘] ??= ?$fun($file[‘savepath‘].$file[‘savename‘]); ???????????????
???????????????}
???????????????//上传成功后保存文件信息，供其他地方调用
???????????????unset($file[‘tmp_name‘],$file[‘error‘]);
???????????????$fileInfo[] = $file;
???????????????$isUpload ??= true;
???????????}
???????}
???????if($isUpload) {
???????????$this->uploadFileInfo = $fileInfo; ???
???????????return true;
???????}else {
???????????$this->error ?= ?‘没有选择上传文件‘; ??????
???????????return false;
???????}
???}

???/**
????+----------------------------------------------------------
????* 转换上传文件数组变量为正确的方式
????+----------------------------------------------------------
????* @access private
????+----------------------------------------------------------
????* @param array $files ?上传的文件变量
????+----------------------------------------------------------
????* @return array
????+----------------------------------------------------------
????* @throws ThinkExecption
????+----------------------------------------------------------
????*/
private function dealFiles($files) {
??$fileArray = array();
??foreach ($files as $file){
??if(is_array($file[‘name‘])) {
??$keys = array_keys($file);
??$count = count($file[‘name‘]);
??for ($i=0; $i<$count; $i++) {
??foreach ($keys as $key) {
??$fileArray[$i][$key] = $file[$key][$i];
??}
??}
??}else{
??$fileArray=$files;
??}
??break;
??}
??return $fileArray;
}

???/**
????+----------------------------------------------------------
????* 获取错误代码信息
????+----------------------------------------------------------
????* @access protected
????+----------------------------------------------------------
????* @param string $errorNo ?错误号码
????+----------------------------------------------------------
????* @return void
????+----------------------------------------------------------
????* @throws ThinkExecption
????+----------------------------------------------------------
????*/
???protected function error($errorNo)
???{
????????switch($errorNo) {
???????????case 1:
???????????????$this->error = ‘上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值‘;
???????????????break;
???????????case 2:
???????????????$this->error = ‘上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值‘;
???????????????break;
???????????case 3:
???????????????$this->error = ‘文件只有部分被上传‘;
???????????????break;
???????????case 4:
???????????????$this->error = ‘没有文件被上传‘;
???????????????break;
???????????case 6:
???????????????$this->error = ‘找不到临时文件夹‘;
???????????????break;
???????????case 7:
???????????????$this->error = ‘文件写入失败‘;
???????????????break;
???????????default:
???????????????$this->error = ‘未知上传错误！‘;
???????}
???????return ;
???}

???/**
????+----------------------------------------------------------
????* 根据上传文件命名规则取得保存文件名
????+----------------------------------------------------------
????* @access private
????+----------------------------------------------------------
????* @param string $filename 数据
????+----------------------------------------------------------
????* @return string
????+----------------------------------------------------------
????*/
???private function getSaveName($filename)
???{
???????$rule = $this->saveRule;
???????if(empty($rule)) {//没有定义命名规则，则保持文件名不变
???????????$saveName = $filename[‘name‘];
???????}else {
???????????if(function_exists($rule)) {
???????????????//使用函数生成一个唯一文件标识号
???????????$saveName = $rule().".".$filename[‘extension‘];
???????????}else {
???????????????//使用给定的文件名作为标识号
???????????$saveName = $rule.".".$filename[‘extension‘];
???????????}
???????}
???????return $saveName;
???}

???/**
????+----------------------------------------------------------
????* 检查上传的文件类型是否合法
????+----------------------------------------------------------
????* @access private
????+----------------------------------------------------------
????* @param string $type 数据
????+----------------------------------------------------------
????* @return boolean
????+----------------------------------------------------------
????*/
???private function checkType($type)
???{
???????if(!empty($this->allowTypes)) {
???????????return in_array(strtolower($type),$this->allowTypes);
???????}
???????return true;
???}

???/**
????+----------------------------------------------------------
????* 检查上传的文件后缀是否合法
????+----------------------------------------------------------
????* @access private
????+----------------------------------------------------------
????* @param string $ext 后缀名
????+----------------------------------------------------------
????* @return boolean
????+----------------------------------------------------------
????*/
???private function checkExt($ext)
???{
???????if(!empty($this->allowExts)) {
???????????return in_array(strtolower($ext),$this->allowExts);
???????}
???????return true;
???}

???/**
????+----------------------------------------------------------
????* 检查文件大小是否合法
????+----------------------------------------------------------
????* @access private
????+----------------------------------------------------------
????* @param integer $size 数据
????+----------------------------------------------------------
????* @return boolean
????+----------------------------------------------------------
????*/
???private function checkSize($size)
???{
???????return !($size > $this->maxSize) || (-1 == $this->maxSize);
???}

???/**
????+----------------------------------------------------------
????* 检查文件是否非法提交
????+----------------------------------------------------------
????* @access private
????+----------------------------------------------------------
????* @param string $filename 文件名
????+----------------------------------------------------------
????* @return boolean
????+----------------------------------------------------------
????*/
???private function checkUpload($filename)
???{
???????return is_uploaded_file($filename);
???}

???/**
????+----------------------------------------------------------
????* 取得上传文件的后缀
????+----------------------------------------------------------
????* @access private
????+----------------------------------------------------------
????* @param string $filename 文件名
????+----------------------------------------------------------
????* @return boolean
????+----------------------------------------------------------
????*/
???private function getExt($filename)
???{
???????$pathinfo = pathinfo($filename);
???????return $pathinfo[‘extension‘];
???}

???/**
????+----------------------------------------------------------
????* 取得上传文件的信息
????+----------------------------------------------------------
????* @access public
????+----------------------------------------------------------
????* @return array
????+----------------------------------------------------------
????*/
???public function getUploadFileInfo()
???{
???????return $this->uploadFileInfo;
???}

???/**
????+----------------------------------------------------------
????* 取得最后一次错误信息
????+----------------------------------------------------------
????* @access public
????+----------------------------------------------------------
????* @return string
????+----------------------------------------------------------
????*/
???public function getErrorMsg()
???{
???????return $this->error;
???}

}//类定义结束
?>

后端图片上传

原文地址：https://www.cnblogs.com/qiaoliang151715/p/8321340.html

后端图片上传

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