[php] Check if specific input file is empty

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

<input type=file name="cover_image">
<input type=file name="image1">
<input type=file name="image2">

How can I check if cover_image is empty - no file is put for upload?

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
}

 if( ($_POST) && (!empty($_POST['cover_image'])) )    //verifies  if post exists and cover_image is not empty
    {
    //execute whatever code you want
    }

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

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

if (empty($_FILES['cover_image']['name']))

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

You can check if there is a value, and if the image is valid by doing the following:

if(empty($_FILES['cover_image']['tmp_name']) || !is_uploaded_file($_FILES['cover_image']['tmp_name']))
{
   // Handle no image here...
}

<input type="file" class="custom-file-input" id="imagefile" name="imagefile[]"  multiple lang="en">
<input type="hidden" name="hidden_imagefile[]" value="<?=$row[2]; ?>" class="form-control border-input" >

    if($_FILES['imagefile']['name'] == '')
        {
          $img = $_POST['hidden_imagefile'];
        }
        else{
          $img = '';
          $uploadFolder = 'uploads/gallery/';
          foreach ($_FILES['imagefile']['tmp_name'] as $key => $image) {
            $imageTmpName = time() .$_FILES['imagefile']['tmp_name'][$key];
            $imageName = time() .$_FILES['imagefile']['name'][$key];
            $img .= $imageName.',';
            $result = move_uploaded_file($imageTmpName, $uploadFolder.$img);
          }
          
        }

if(!empty($_FILES)) { // code if not uploaded } else { // code if uploaded }

check after the form is posted the following

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

simple :

if($_FILES['cover_image']['error'] > 0)
    // cover_image is empty

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