Undefined Index: File

Undefined Index while uploading file

Change your PHP script as below and try

<?php 
    if(isset($_POST['submit'])){
        $name       = $_FILES['file']['name'];  
        $temp_name  = $_FILES['file']['tmp_name'];  
        if(isset($name) and !empty($name)){
            $location = '../uploads/';      
            if(move_uploaded_file($temp_name, $location.$name)){
                echo 'File uploaded successfully';
            }
        } else {
            echo 'You should select a file to upload !!';
        }
    }
?>

PHP Undefined index error $_FILES?

first: try to strict programming

error_reporting(E_ALL | E_STRICT);

also you must use isset for check is index for array available or not

if (isset($_POST['submitbtn']) && isset($_FILES['avatar'])) {
     // ...
}

also check php configuraion

file_uploads    "1"
upload_max_filesize     "2M"
post_max_size   "8M"
max_file_uploads    20

post max size must be larger than upload max file size.

also as guys said check form enctype

Undefined index: file

"Undefined index" means you're trying to read an array element that doesn't exist.

Your specific problem seems to be that you're trying to read upload data that doesn't exist yet: When you first visit your upload form, there is no $_FILES array (or rather, there's nothing in it), because the form hasn't been submitted. But since you don't check if the form was submitted, these lines net you an error:

//Set Temp Name for upload.
$uploaded->set_tmp_name($_FILES['file']['tmp_name']);
//Set file size
$uploaded->set_file_size($_FILES['file']['size']);
//set file type
$uploaded->set_file_type($_FILES['file']['type']);
//set file name
$uploaded->set_file_name($_FILES['file']['name']);

They're all trying to read the value of $_FILES['file'] to pass them to the methods of $uploaded.

What you need is a check beforehand:

if (isset($_FILES['file'])) {
    $uploaded = new upload;
    //set Max Size
    $uploaded->set_max_size(350000);
    //Set Directory
    $uploaded->set_directory("data");
    //Set Temp Name for upload.
    $uploaded->set_tmp_name($_FILES['file']['tmp_name']);
    //Set file size
    $uploaded->set_file_size($_FILES['file']['size']);
    //set file type
    $uploaded->set_file_type($_FILES['file']['type']);
    //set file name
    $uploaded->set_file_name($_FILES['file']['name']);
    //start copy process
    $uploaded->start_copy();
    if($uploaded->is_ok()) 
        echo " upload is doen.";
    else
        $uploaded->error()."<br>";
}

Notice: Undefined index: file

I think

<input type="file" name="fileToUpload" id="fileToUpload">

should be

<input type="file" name="file" id="fileToUpload">

Notice: Undefined index: file when uploading file

For the next one looking for it :)

To upload a file you will need enctype="multipart/form-data":

<form enctype="multipart/form-data">
    <input type="file" name="file"/>
</form>

undefined index in php while uploading an image file

When you first load the page, $_FILES['myimage']['name'] and $_FILES['myimage']['tmp_name']; will be undefined because you haven't uploaded anything yet.

The solution is:

First add a name attribute your submit button, like this:

<button type="submit" name="submit" class="btn btn-info">upload</button>

And wrap your form processing code inside an if block, like this:

// your code

if(isset($_POST['submit'])){
    $location="profilepics/";
    $name=$_FILES['myimage']['name'];
    $temp_name=$_FILES['myimage']['tmp_name'];
    if(isset($name)){
        move_uploaded_file($temp_name,$location.$name);
    }
}