其实上传文件明白了道理也就很简单啦，小编当时学的时候也是一头雾水，搞了好多天才弄懂一点，好了废话少说吧，嘿嘿。首先运用的是tp3.2的框架，我这里前端名字是img.html
所以后台首先运用的是public function img()，然后选择上传的商品种类，再根据种类来选择固定的函数，而upload也就是确定所上传文件的格式还有保存路径等。最后再根据db_img上传到数据库。
首先是前端代码
<!DOCTYPE html>
<html>
<head>
<title>后台管理</title>
<link rel="stylesheet" type="text/css" href="__PUBLIC__/css/img.css"/>
</head>
<body>
<header>
<h1><img src="__PUBLIC__/image/admin_logo.png"/></h1>
<ul class="rt_nav">
<li><a href="{:U('Login/img')}" target="_blank" class="website_icon">站点首页</a></li>
<li><a href="{:U('Login/order2')}" class="admin_icon">查看交易</a></li>
<li><a href="{:U('Login/loginprocess')}" class="quit_icon">安全退出</a></li>
</ul>
</header>
<aside class="lt_aside_nav content mCustomScrollbar">
<h2><a href="index.php">起始页</a></h2>
<ul>
<li>
<dl>
<dt>商品信息</dt>
<!--当前链接则添加class:active-->
<dd><a href="{:U('Login/img')}" >商品列表</a></dd>
<dd><a href="{:U('Login/img')}" >商品分类</a></dd>
<dd><a href="{:U('Login/img')}" >商品列表</a></dd>
<dd><a href="{:U('Login/img')}" >商品信息</a></dd>
</dl>
</li>
<li>
<dl>
<dt>订单信息</dt>
<dd><a href="{:U('Login/order2')}">订单列表</a></dd>
<dd><a href="{:U('Login/order3')}">用户购物车列表</a></dd>
</dl>
</li>
<li>
<p class="btm_infor">© 八号当铺 版权所有</p>
</li>
</ul>
</aside>
<h2><strong style="color:grey;text-align: center;" >欢迎<span style="color:red">{$_SESSION['username']}</span>成为卖家</strong></h2>
<section>
<h2><strong style="color:grey;">卖家上传</strong></h2>
<form method="POST" enctype="multipart/form-data">
<ul class="ulColumn2">
<li>
<span class="item_name" style="120px;">商品名称：</span>
<input type="text" class="textbox textbox_295" placeholder="文本信息提示..." name="f_name"/>
<!-- <span class="errorTips">错误提示信息...</span> -->
</li>
<li>
<span class="item_name" style="120px;">商品价格：</span>
<input type="text" class="textbox textbox_295" placeholder="文本信息提示..." name="money" />
<!-- <span class="errorTips">错误提示信息...</span> -->
</li>
<li>
<span class="item_name" style="120px;">种类：</span>
<select class="select" name="sel">
<option value="close">服装</option>
<option value="book">书刊</option>
<option value="dian">电子</option>
</select>
<!-- <span class="errorTips">错误提示信息...</span> -->
</li>
<!-- <li>
<span class="item_name" style="120px;">是否热销：</span>
<label class="single_selection" ><input type="radio" value="y" />推荐</label>
<label class="single_selection"><input type="radio" value="n" />不推荐</label>
</li> -->
<li>
<span class="item_name" style="120px;">摘要：</span>
<textarea placeholder="摘要信息" class="textarea" style="500px;height:100px;" name="message"></textarea>
</li>
<li>
<span class="item_name" style="120px;">上传图片：</span>
<label class="uploadImg">
<input type="file" name="file[]" />
<span>上传图片</span>
</label>
</li>
<li>
<span class="item_name" style="120px;"></span>
<input type="submit" value="提交" class="link_btn"/>
</li>
</ul>
</form>
</section>
</body>
</html>
其次是后台（运用的是tp3.2框架）
// //后台添加图片
public function upload()
{
// //实例化上传类
$upload = new ThinkUpload();
$upload->maxSize = 3145728;
$upload->exts = ['jpg', 'jpeg', 'gif', 'png'];
$upload->savePath = './Public/Uploads/';
$upload->rootPath = './';
$info = $upload->upload();
$upload = new Upload();
if (!$info) {
$this->error($upload->getError());
// $this->error('shuangchuanshibai ',U('Login/loginss'),2);
} else {
//$this->success('上传成功');
return $info;
}
}
public function insert()
{
$login = D('logins');
$result = $login->where(['username' => $_SESSIN['username']])->field()->find();
// if(empty($_FILES)){
if (empty($_FILES)) {
$this->error('请选择需要上传的文件');
}
if (!empty($_FILES)) {
$arr = $this->upload();
foreach ($arr as $key => $value) {
$path[]['savepath'] = $value['savepath'] . $value['savename'];
}
// $data['single']='推荐';
$data['f_name'] = $_POST['f_name'];
// $data['create_time']=time();
$data['money'] = $_POST['money'];
$data['message'] = $_POST['message'];
$data['username'] = $_SESSION['username'];
// $data['create_time'] = time
// $data['login_id'] = $result['id'];();
if (isset($data)) {
//如果上传文件的信息不为空，我们就将这些信息保存到数据库中
$this->db_img($data, $path);
} else {
$this->error('数据为空');
}
}
}
public function db_img($data, $path)
{
// if($_POST['sel']=='close'){
// if($_POST['single']=='y'){
$file = D('file');
$img = D('file_c');
foreach ($path as $vo) {
$data['savepath'] = $vo['savepath'];
}
// $data['single'] ="推荐";
$data['f_name'] = $_POST['f_name'];
$data['username'] = $_SESSION['username'];
$t = time();
$data['create_time'] = date("Y-m-d H:i:s", $t);
$data['money'] = $_POST['money'];
$data['message'] = $_POST['message'];
// $img->add();
if (!$img->create($data) || !$file->create($data)) {
$this->error('上传失败');
} else {
if (!$img->add($data) || !$file->add($data)) {
$this->error('上传失败');
}
}
$this->success('上传成功....', U('Login/img'));
}
//insert1
public function insert1()
{
$login = D('logins');
$result = $login->where(['username' => $_SESSIN['username']])->field()->find();
// if(empty($_FILES)){
if (empty($_FILES)) {
$this->error('请选择需要上传的文件');
}
if (!empty($_FILES)) {
$arr = $this->upload();
foreach ($arr as $key => $value) {
$path[]['savepath'] = $value['savepath'] . $value['savename'];
}
$data['f_name'] = $_POST['f_name'];
$data['money'] = $_POST['money'];
$data['message'] = $_POST['message'];
$data['username'] = $_SESSION['username'];
if (isset($data)) {
//如果上传文件的信息不为空，我们就将这些信息保存到数据库中
$this->db_img1($data, $path);
} else {
$this->error('数据为空');
}
}
}
public function db_img1($data, $path)
{
// if($_POST['sel']=='close'){
// if($_POST['single']=='y'){
$img = D('file_b');
$file = D('file');
foreach ($path as $vo) {
$data['savepath'] = $vo['savepath'];
}
$data['f_name'] = $_POST['f_name'];
$data['username'] = $_SESSION['username'];
$t = time();
$data['create_time'] = date("Y-m-d H:i:s", $t);
$data['money'] = $_POST['money'];
$data['message'] = $_POST['message'];
// $img->add($data);
if (!$img->create($data) || !$file->create($data)) {
$this->error('上传失败');
} else {
if (!$img->add($data) || !$file->add($data)) {
$this->error('上传失败');
}
}
$this->success('上传成功....', U('Login/img'));
}
//insert2
public function insert2()
{
$login = D('logins');
$result = $login->where(['username' => $_SESSIN['username']])->field()->find();
// if(empty($_FILES)){
if (empty($_FILES)) {
$this->error('请选择需要上传的文件');
}
if (!empty($_FILES)) {
$arr = $this->upload();
foreach ($arr as $key => $value) {
$path[]['savepath'] = $value['savepath'] . $value['savename'];
}
$data['f_name'] = $_POST['f_name'];
$data['money'] = $_POST['money'];
$data['message'] = $_POST['message'];
$data['username'] = $_SESSION['username'];
if (isset($data)) {
//如果上传文件的信息不为空，我们就将这些信息保存到数据库中
$this->db_img2($data, $path);
} else {
$this->error('数据为空');
}
}
}
public function db_img2($data, $path)
{
// if($_POST['sel']=='close'){
// if($_POST['single']=='y'){
$img = D('file_d');
$file = D('file');
foreach ($path as $vo) {
$data['savepath'] = $vo['savepath'];
}
$data['f_name'] = $_POST['f_name'];
$data['username'] = $_SESSION['username'];
$t = time();
$data['create_time'] = date("Y-m-d H:i:s", $t);
$data['money'] = $_POST['money'];
$data['message'] = $_POST['message'];
// $img->add($data);
if (!$img->create($data) || !$file->create($data)) {
$this->error('上传失败');
} else {
if (!$img->add($data) || !$file->add($data)) {
$this->error('上传失败');
}
}
$this->success('上传成功....', U('Login/img'));
}
public function img()
{
if (IS_POST) {
if ($_POST['sel'] == 'close') {
$this->insert();
}
if ($_POST['sel'] == 'book') {
$this->insert1();
}
if ($_POST['sel'] == 'dian') {
$this->insert2();
}
}
$this->display();
}