PHP Undefined Index Error $_Files

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

$_FILES undefined index : file

Correct way is:

<?php
if(isset($_POST['submit'])){
echo $_FILES['file']['error'];
}
?>

<form action="uploads.php" method = "POST" enctype="multipart/form-data">
    <input  name="file" type="file"><br>
    <input type="Submit" value="Submit" name='submit'/>
</form>

You are echoing "$_FILES['file']['error']" before form submit. echo input type file value or something after form submission.

php upload error, undefined index userfile

undefined index userfile, that means when the page loads there is no $_FILES['imageupload'] you need to submit the page to have that variable

<?php
if(isset($_POST['save'])){
    $path="upload/";
    $name = $_FILES['imageupload']['name'];//Name of the File
    $temp = $_FILES['imageupload']['tmp_name'];
    if(move_uploaded_file($temp, $path . $name)){
        echo "success";
    }else{
        echo "failed";
    }
}
?>
<form method="post" action="" enctype="multipart/form-data">
    <input type="file" name="imageupload">
    <input type="submit" name="save" value="submit">
</form>

$_FILES undefined index error

Try setting the proper enctype in your form tag:

<form action="wpis.php" method="POST" enctype="multipart/form-data">

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