php+ajax实现图片文件上传功能实例

2019-04-16 05:12:30 来源：易采站长站作者：于丽

index.js文件：

$(function(){
$("#upload_file").change(function(){
$("#uploadFrom").submit();
});
});
function stopSend(str){
var im="<img src='upload/images/"+str+"'>";
$("#msg").append(im);
}

upload.php文件：

<?php
$file=$_FILES['upfile'];
$name=rand(0,500000).dechex(rand(0,10000)).".jpg";
move_uploaded_file($file['tmp_name'],"upload/images/".$name);
//调用iframe父窗口的js 函数
echo "<script>parent.stopSend('$name')</script>";
?>

方法三，原生态ajax文件上传

<!DOCTYPE html>
<html>
<head>
    <title>Html5 Ajax 上传文件</title>
    <meta charset="utf-8">
<script type="text/javascript">
    var xhr;
    function createXMLHttpRequest()
    {
        if(window.ActiveXObject)
        {
            xhr = new ActiveXObject("Microsoft.XMLHTTP");
        }
        else if(window.XMLHttpRequest)
        {
            xhr = new XMLHttpRequest();
        }
    }
    function UpladFile()
    {
        var fileObj = document.getElementById("file").files[0];
        var FileController = 'upload.php';
        var form = new FormData();
        form.append("myfile", fileObj);
        createXMLHttpRequest();
        xhr.onreadystatechange = handleStateChange;
        xhr.open("post", FileController, true);
        xhr.send(form);
    }
    function handleStateChange()
    {
        if(xhr.readyState == 4)
        {
            if (xhr.status == 200 || xhr.status == 0)