Check if specific input file is empty

Question

In my form I have 3 input fields for file upload:

Answer 1

Method 1

if($_FILES['cover_image']['name'] == "") {
// No file was selected for upload, your (re)action goes here
}

Method 2

if($_FILES['cover_image']['size'] == 0) {
// No file was selected for upload, your (re)action goes here
}

Answer 2

check after the form is posted the following

$_FILES["cover_image"]["size"]==0

Answer 3

if ($_FILES['cover_image']['size'] == 0 && $_FILES['cover_image']['error'] == 0)
{ 
      // Code comes here
}

This thing works for me........

Answer 4

if($_FILES['img_name']['name']!=""){
   echo "File Present";
}else{
  echo "Empty file";
}

Answer 5

    if (!$_FILES['image']['size'][0] == 0){ //}