Not able to get the image on server. about file-upload-with-preview HOT 4 CLOSED

Hello there,

I see that you're having issues uploading the files found in the cachedFileArray to your PHP backend.

In looking at your code, I see a few places that could be causing the issue.

First, I understand that you want to pass the cachedFileArray, which is an array of JavaScript Files using a hidden input. To be honest, I don't think this will work. I'm not totally sure, but to me, especially with the way you are JSON.stringify()'ing the data, that will not pass the Files to the backend properly.

Next, to access these files, once they are uploaded correctly from the frontend, the files will usually be in the $_FILES variable in the PHP world. Now, this is all dependent on how you have your environment up, so this may not be the case for you, but this is the standard case.

So, if it were me, I would try to upload the files in a FormData type of object, which then you would send to the backend and would appear in the $_FILES variable on the PHP side.

Here's some reading on this:
How to pass file from JavaScript to PHP?
jQuery AJAX file upload PHP
How to upload Multiple Image files with jQuery AJAX and PHP

Let me know, thank you.

from file-upload-with-preview.

I wrote a small library as per the requirement, that works fine and cross browser compatible as well.

I am may be wrong but even if I JSON.stringify() and parse back to arrays the cachedFileArray in console itself not giving the proper output.

I checked all the previous bugs but one have that issue.

Still if you check it once.

And yes formData is a good option but I have to do just image preview work and complete project is already in production. To use formData I have to change many things in form submission and that will be a risky part 😢

from file-upload-with-preview.

Hmm, honestly I'm not sure, as I think it's the actual act of running JSON.stringify() that changes the type of data the cachedFileArray is holding and therefore causing the issue, which would be impossible to solve at that point.

I just responded to someone here about the FormData method - I know you said that won't work for you know, but let me share that code here, so that maybe it can give you some idea on where you could go from here. Below is the copied code:

var formElement = document.getElementById('entry-form');
var formData = new FormData(formElement);
formData.append('firstImage', upload.cachedFileArray[0]); // This will get the first image

$.ajax({
  url: "entry.php",
  type: "POST",
  dataType: "json",
  async: true,
  data: formData,
  contentType: false,
  processData: false,
  cache: false,
  success: function(data) {
    console.log(data)
  },
  error: function(error) {
    console.log(error)
  },
  complete: function(data) {
    console.log(data)
  }
})

Of course, if you have multiple images, you'll want to loop over them and add them accordingly to your formData object.

Ok, so if you follow this pattern, and have your backend PHP set up correctly, you'll be able to access these files in the $_FILES variable in the PHP - and more specifically, the $_FILES['firstImage'] variable according to this example.

Sorry I can't be of more help. Thank you.

from file-upload-with-preview.

Closing for now

from file-upload-with-preview.