Kendo上传完整的事件从php文件返回[object Object]

Question

I had kendo grid with inline editing. Now I want to add an upload images to 'propertyLogo' field. Basically, I use an editor function and call saveUrl: "indexHex.php, and fetch by PHP post method then convert to base64 and store into $imageHex variable.

In kendo Upload complete event, I load the php file and pass $imageHex to textbox. But somehow I get [obeject Object] in the textbox.

Any idea how I can fetch the $imageHex from indexHex.php

Here my sample in DOJO

my indexHex.php

if($_SERVER['REQUEST_METHOD']=='POST') {
    
    $file = $_FILES['fileUpload'];  
    $fileName = $_FILES['fileUpload']['name'];
    $fileTmpName = $_FILES['fileUpload']['tmp_name'];  //directory location 
    $fileSize = $_FILES['fileUpload']['size'];
    $fileError = $_FILES['fileUpload']['error'];  //default 0 | 1 got error
    
    $path = getcwd();
    $fileDestination = $path.'/uploads/'.$fileName;                    
    move_uploaded_file($fileTmpName, $fileDestination); 

    $data = file_get_contents($fileTmpName);
    $imageHex = base64_encode($data);
    
    echo $imageHex;
} 

This problem a almost similar with my previous question but with different approach.

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