jquery ajax 上传文件 demo,Jquery+AJAX上传文件，无刷新上传并重命名文件

index.html

Ajax上传图片

Ajax上传图片

function upload(){

var form = new FormData(document.getElementById("form"));

$.ajax({

url:"upload.php",

type:"post",

data:form,

cache: false,

processData: false,

contentType: false,

success:function(data){

if (data.res == "400") {

$("#upload-result").text("上传成功");

$("#imgdiv").html("");

}else if (data.res == "403") {

$("#upload-result").text("格式不对");

}else if (data.res == "404") {

$("#upload-result").text("上传错误");

}

},

error:function(data){

alert("上传失败")

}

})

}

upload.php

header("Content-type:application/json");

//获取原始文件名

$filename = $_FILES["file"]["name"];

//获取文件后缀名

$hzm = substr($filename,strpos($filename,"."));

//设置新文件名

$newfilename = substr(str_shuffle("QWERTYUIOPASDFGHJKLZXCVBNMqwertyuiopasdfghjklzxcvbnm"),26,10);

// 允许上传的图片后缀

$allowedExts = array("gif", "jpeg", "jpg", "png");

$temp = explode(".", $filename);

$extension = end($temp);

if ((($_FILES["file"]["type"] == "image/gif")

|| ($_FILES["file"]["type"] == "image/jpeg")

|| ($_FILES["file"]["type"] == "image/jpg")

|| ($_FILES["file"]["type"] == "image/pjpeg")

|| ($_FILES["file"]["type"] == "image/x-png")

|| ($_FILES["file"]["type"] == "image/png"))

&& ($_FILES["file"]["size"] < 2048000) // 小于 2000 kb

&& in_array($extension, $allowedExts))

{

if ($_FILES["file"]["error"] > 0)

{

echo "{\"res\":\"404\"}";

}

else

{

// 此处可以输出文件的详细信息

if (file_exists("upload/" . $newfilename.$hzm))

{

//

}

else

{

move_uploaded_file($_FILES["file"]["tmp_name"], "upload/" . $newfilename.$hzm);

echo "{\"path\":\"$newfilename$hzm\",\"res\":\"400\"}";

}

}

}

else

{

echo "{\"res\":\"403\"}";

}

?>

请在当前目录建立upload文件夹用于存放上传后的图片

GiF Demo

Author

Name:TANKING

Date:2020-04-11

Web:LIKEYUNBA.COM

WeChat:face6009