后端图片上传

Posted 2020-10-21 寻梦之旅

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

<div>
<div class="input-inline">
<input type="text" value="" class="input input-auto" id="pic" name="pic" size="25">
<input type="text" value="" class="input input-auto" placeholder="宽" id="pic_w" name="pic_w" size="2">
<input type="text" value="" class="input input-auto" placeholder="高" id="pic_h" name="pic_h" size="2">&nbsp;<a class="button input-file" href="javascript:void(0);">+ 上传图片
<input size="100" onchange="pic_uploads(this)" type="file" name="pic_fileload">
</a>
</div>
</div>

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 <[e-mail]>
// +----------------------------------------------------------------------
// $Id$

/**
+------------------------------------------------------------------------------
* 文件上传类
+------------------------------------------------------------------------------
* @category ORG
* @package ORG
* @subpackage Net
* @author liu21st <[e-mail]>
* @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
?>