这里只拿图片上传做例子：
前端页面
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>多文件上传</title>
</head>
<body>
<input id= "formfiles" type="file" multiple />
<br />
<button id="sub_btn">提交</button>
</body>
<script src="./js/jquery-3.1.1.min.js"></script>
<script src="./js/form.js"></script>
</html>
js代码
$(document).ready(function(){
$('#sub_btn').click(function(){
var pic_data = new FormData();
var filenum = $('#formfiles').get(0).files.length;
for(var i = 0; i < filenum; i++){
pic_data.append(i,$('#formfiles').get(0).files[i]);
}
$.ajax(
{
url:"./uploads.php",
type: "POST",
processData:false,
contentType:false,
data:pic_data,
success:function(data){
alert(data);
}
}
);
});
});
<?php
$file = $_FILES;
$num = count($file);
$result ='';
for($i=0;$i<$num;$i++){
if(is_uploaded_file($file[$i]['tmp_name'])){
$allowExt = array("image/png","image/gif","image/jpeg","image/jpg");
if(!in_array($file[$i]['type'],$allowExt)){
echo "不允许的类型<br />";
continue;
}
$path = "./uploads/";
$fname = date('YmdHis').rand(1000,9999);
$ext = array_pop(explode('.',$file[$i]['name']));
$newFile = $path.$fname.'.'.$ext;
if(move_uploaded_file($file[$i]['tmp_name'],$newFile)){
$n = $i + 1;
$result = $result. "上传第{$n}张图片成功|";
}else{
$n = $i + 1;
$result = $result."上传第{$n}张图片失败|";
}
}
}
echo $result;