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javascript - Undefined variable PHP uploader video

Hey everyone,

I'm currently working on a project where I need to upload videos using PHP and integrate it with JavaScript. I have successfully written the code to upload images, but I'm encountering an issue when it comes to uploading videos.

The problem I'm facing is that whenever I try to upload a video, I get an "Undefined variable" error in my PHP code. It seems like the PHP script is not able to recognize the variable I'm using to handle the video uploads.

I have checked my JavaScript code, and it seems to be fine since it is able to handle image uploads without any issues. I'm wondering if there is something specific I need to do in PHP when it comes to handling video uploads.

Here's a snippet of my code in PHP that is causing the error:

$video = $_FILES['video']['name'];
$video_tmp = $_FILES['video']['tmp_name'];

move_uploaded_file($video_tmp, "uploads/".$video);

In my JavaScript file, I have confirmed that the variable "video" is being sent to the server properly. However, when I try to access it in PHP, it throws the error. I'm not sure what I might be missing here.

Any guidance or suggestions on how to resolve this "Undefined variable" issue and successfully handle video uploads would be greatly appreciated.

Thank you!

All Replies


Hey there,

I've faced a similar issue before while working on a project where I had to upload videos using PHP and JavaScript. The "Undefined variable" error usually occurs when the PHP script is unable to find the variable you're trying to access.

In my case, the problem was that I forgot to include the "enctype" attribute in my HTML form. This attribute is necessary when you're uploading files, including videos. Without it, the file data won't be sent to the server correctly.

Make sure that your form tag in HTML looks something like this:

<form action="upload.php" method="POST" enctype="multipart/form-data">
<!-- Your input elements here -->

The `enctype="multipart/form-data"` part is essential to handle file uploads properly. Without it, the file data won't be accessible in the PHP script, leading to an "Undefined variable" error.

I hope this resolves your issue! Let me know if you have any further questions or if this solution doesn't work for you.


Hi there,

I faced a similar problem with uploading videos using PHP and JavaScript. The "Undefined variable" error can be frustrating, but thankfully there are a few things you can check to fix it.

First, make sure you have correctly named the input field in your HTML form. In your case, the input field for the video should have the name attribute set as "video". For example:

<input type="file" name="video" />

Next, verify that you are accessing the variable correctly in your PHP code. It seems like you are doing it right, but it's worth double-checking. Also, ensure that the name attribute in the PHP code matches the one in your HTML form.

If both the HTML form input field name and the PHP variable name are correct, then there might be an issue with the file upload path. Ensure that the path you are moving the uploaded video to (e.g., "uploads/".$video) is valid and that the appropriate permissions are set.

Additionally, it's always a good practice to validate and sanitize user inputs, especially when dealing with file uploads. Ensure that you have proper checks in place to handle file size, format, and any security concerns.

If the issue persists, you might want to consider debugging by printing the $_FILES array in PHP to see the structure and contents of the uploaded video information. This can help identify any potential problems with the file upload process.

I hope these insights help you resolve the "Undefined variable" issue you're facing. Feel free to ask if you need any further assistance!

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