Question

I have a file input known as ‘name=fileImage’. Now I have php code below where it checks to see if file exists in the folder (ImageFiles) or not:

if (file_exists("ImageFiles/" . $_FILES["fileImage"]["name"]))
  {

  }

My question is that if a file does exist in the folder, how can it be coded so that it still uploads the file but it gives it a different file name. Maybe something like automatically add a number at the end of the filename to give it a different file name?

Answer 1

$_FILES is just a variable, that happens to be superglobal and pre-populated with file upload data. Meaning you can easily change it.

For example:

if( file_exists("ImageFiles/".$_FILES['fileImage']['name'])) {
    $parts = explode(".",$_FILES['fileImage']['name']);
    $ext = array_pop($parts);
    $base = implode(".",$parts);
    $n = 2;
    while( file_exists("ImageFiles/".$base."_".$n.".".$ext)) $n++;
    $_FILES['fileImage']['name'] = $base."_".$n.".".$ext;
}
// now use $_FILES['fileImage']['name'] just like you would normally