如何html形式post-file上传和从php服务器读取json响应

Question

i am trying file uploading to php my server.file and data uploading through multi part /form-data ,the file and data received on php server but in my php server return json response .please help me how to read json response in my webpage and if its success(code=0) means it redirect another page .the php sever is common for both android and web pages .json response look like {"code":0,"message":"success"}

<div style="height:0px;overflow:hidden">
    <form id="myForm" action="http://192.168.2.4/digiid/api/addid" 
        method="post" enctype="multipart/form-data" runat="server">

        <input type="file" name="file" id="file" onchange="showMyImage(this)" />
        <input type="hidden" name="userid" value="<?php echo $_SESSION["userid"]?>">
        <input type="hidden" id="inputfilename" name="filename" value="here">
    </form>
</div>

<a class="button1" id="browseButton" onclick=""  style="width:12%;height: 30px; text-decoration:none;"><font color="white" size="5px">Select ID</font></a>
<br/>

<div>

            <img src='images/capture_picture_size.png' id='imgscreen'  width='200' height='200'>

<br/>


<p id="filename" style="color: #ffffff; font-size: 20px" >
    Title of the ID<br/></p>

<a class="button1"onclick="myFunction()" style= " width:12%;height: 30px; text-decoration:none;"><font color="white" size="5px">Save ID</font></a></form>

</div>  

<script>
    function myFunction() {
       document.getElementById("myForm").submit();
    }
</script>

<script>
    browseButton.onclick=function chooseFile() {
        document.getElementById("file").click(); 
    };

    function showMyImage(fileInput) {

        var files = fileInput.files;

        var file = files[0];
        var imageType = /image.*/;

        var img=document.getElementById("imgscreen");
        var reader = new FileReader();
        reader.onload = (function(aImg) {
            return function(e) {
            //x=e.target.result

            img.src = e.target.result;
            var extfilename=file.name;
            document.getElementById("filename").innerHTML=extfilename.slice(0,-5) ;

            document.getElementById("inputfilename").value=extfilename.slice(0,-5);
     };
 })(img);

 reader.readAsDataURL(file);

 }</script>

Answer 1

try json_decode.

    $data = ({"code":0, "message":"success"});
    $array = json_decode($data, true);

by passing 2nd parameter to true you will get response in array instead of object.

the array will be then populated as follow:

    array (size=2)
    'code' => int 0
    'message' => string 'success' (length=7)