此处以上传图片为例：
html文件：
1 <html lang="en"> 2 ????<meta charset="UTF-8"> 3 ????<title>上传图片</title> 4 ????<script src="http://code.jquery.com/jquery-1.9.1.min.js"></script> 5 ????<style> 6 ????????#w1 img{ 7 ????????????width: 350px; 8 ????????????height: auto; 9 ????????????margin: 10px;10 ????????}11 ????</style>12 <body>13 <form method="post" action="d.php" enctype="multipart/form-data">14 ????<input name=‘uploads[]‘ type="file" multiple onchange="tu(this)">15 ????<input type="submit" name="uploadpic" value="上传">16 </form>17 <div id="w1"></div>18 </body>19 <script>20 ????function tu(dom){21 ????????var url = dom.files;22 ????????//var path = window.URL.createObjectURL(dom.files[0]);23 ????????//var path1 = window.URL.createObjectURL(dom.files[1]);24 ????????$.each(url, function(i){25 ????????????var path = window.URL.createObjectURL(url[i]);26 ????????????$(‘#w1‘).append("<img src=‘"+ path +"‘>");27 ????????});28 ????????//$(‘#w1‘).html("<img src=‘"+ path +"‘>");29 ????????// $(‘#w2‘).html("<img src=‘"+ path1 +"‘>");30 ????????//alert(path);31 ????}32 </script>33 </html>php文件：
1 <?php 2 /** 3 ?* Created by PhpStorm. 4 ?* User: Administrator 5 ?* Date: 2018/3/20 6 ?* Time: 18:28 7 ?*/ 8 header("content-type:text/html; charset=utf8"); 9 10 if($_POST[‘uploadpic‘]==‘上传‘){11 ????// 链接数据库12 ????$conn=mysqli_connect("localhost","root","root", "mydata") or die("数据库连接错误".mysql_error());13 ????mysqli_query($conn, "set names utf8");14 ????//上传图片保存的路径15 ????$dest_folder = "upload";16 ????// 判断保存路径文件是否存在17 ????if(!file_exists($dest_folder)){18 ????????mkdir($dest_folder, 700); // 创建文件夹, 700最高权限19 ????}20 ????//$arr = array(); ??//定义数组存放上传图片的名称方便你以后会用的。21 ????$count = 0; // 统计上传文件个数22 ????$tp = array(".gif", ".jpg", ".png"); ??//检查上传文件是否在允许上传的格式23 ????// 循环取出上传文件24 ????foreach ($_FILES["uploads"]["error"] as $key => $error){25 ????????// 获取原文件名26 ????????$former_name = $_FILES["uploads"]["name"][$key];27 ????????//截取原文件名后缀28 ????????$a = substr($former_name,strrpos($former_name,‘.‘));29 ????????//截取原文件名30 ????????$prename = substr($former_name,0,strrpos($former_name,‘.‘)); //echo $prename; exit;31 32 ????????// 判断文件的格式33 ????????if(!in_array($a, $tp)){34 ????????????echo "<script> alert(‘系统不支持改文件格式!‘); </script>";35 ????????????exit;36 ????????}37 ????????// 判断每一个文件是否成功上传38 ????????if($error == UPLOAD_ERR_OK){39 ????????????// 获取临时文件名称40 ????????????$tmp_name = $_FILES["uploads"]["tmp_name"][$key];41 ????????????// 确保文件的唯一性，对文件进行重命名 （日期+随机数+后缀）42 ????????????$save_name = time().mt_rand(1000,9999).$a;43 ????????????// 保存文件的路径44 ????????????$uploadfile = $dest_folder.‘/‘.$save_name;45 ????????????// 路径保存到数据库46 ????????????$query = "insert into product(name, tupian) values(‘$prename‘,‘$uploadfile‘)";47 ????????????$res = mysqli_query($conn, $query);48 ????????????if(!$res){49 ????????????????die(‘错误：‘.mysqli_error($conn));50 ????????????}51 ????????????// 移动文件到指定的路径52 ????????????move_uploaded_file($tmp_name, $uploadfile);53 54 ????????????// 打印保存的文件55 ????????????echo $prename."原名称<br/>";56 ????????????echo $uploadfile."保存路径<br/>";57 ????????????$count ++;58 ????????}59 ????}60 ????echo "总共".$count."文件";61 }php多文件上传（实例）
原文地址：https://www.cnblogs.com/wsybky/p/8625147.html