A way to test for a file upload

Question

I'm writing a script to handle a file upload. I've got the script in place, validating and uploading correctly.

But....the upload is optional. When I submit the form, the $_FILES['field_name'] is always present which consequently forces my validation to kick in.

How can I detect if there is a file upload or not?

Answer 1

Take a look at is_uploaded_file.

if (is_uploaded_file($_FILES['userfile']['tmp_name'])) {
   echo "File ". $_FILES['userfile']['name'] ." uploaded successfully.\n";
}

Answer 2

You could use :

if (!empty($_FILES['file']['name'])) {
}

Which amounts to (almost) the same as the other answers on here.

Answer 3

I use:

if(isset($_FILES['file']) && $_FILES['file']['name'] != '') {

Where 'file' is the name of your file field.

Answer 4

    if(isset($_FILES['file']['name']) && $_FILES['file']['name'] != '') {
// Code goes here
}