Undefined file input tag in PHP

Question

I have a problem

I have a file type input tag that goest like this:

<input type="file" name="imageupload" id="imageupload" value="<?php $imagefile?>">

I have a PHP file that fetch the file name of the image uploaded in the file input tag and my code goes like this:

//Declare the file input tag
$imagefile = trim($_POST['imageupload']);
echo "$imagefile";

I get an error in this part, the declaration part, it says "Notice: Undefined index: imagefile".

Everything works fine if I select an image but if I don't select an image the error shows up.

I would like to assign a default value to the file input tag let say "default.jpg" if user leave it empty or null. I got the condition like this:

if($_FILES['imageupload']['name'] == "" || if($_FILES['imageupload']['size'] == 0) {
$imagefile = trim("default.jpg");
}

then

echo "$imagefile";

I hope my question is specific enough, Please help and thank you.

Answer 1

You can do this to get saved from that error

if(isset($_POST['imageupload']))
{
  $imagefile = trim($_POST['imageupload']);
  echo "$imagefile";
}
else
{
  $imagefile = 'default.jpg';
}