Have user validate file before saving to server - php

Question

My script has a user upload a pdf. I have found a pdf parser that then displays the first part of the plain text. The user will then verify that the data is the correct data. If it is, then the user submits the data and it saves it to a file. For data that isn't a file, I've always passed the info using invisible form fields to an execute page. However with a file I'm not sure the best way to do it.
if ($_FILES["file"]["error"] > 0){
echo "Error: " . $_FILES["file"]["error"] . "<br>";
}
else{
$uploadedFile = $_FILES["file"]["tmp_name"];
$result = pdf2text($uploadedFile);
echo substr($result, 0, 200);
echo "<BR>";
}

Answer 1

Based on the POST method uploads manual
The file will be deleted from the temporary directory at the end of
the request if it has not been moved away or renamed.
You will want to move your tmp_file to a cache directory inside your app, and then based on your validation being true or false remove it, or move it to a permanent directory.
if ($_FILES["file"]["error"] > 0){
echo "Error: " . $_FILES["file"]["error"] . "<br>";
}
else{
$uploadedFile = $_FILES["file"]["tmp_name"];
$tmp_file = PATH_TO_CACHE_FOLDER . time(). $_FILES["file"]["name"]
if (move_uploaded_file($_FILES['userfile']['tmp_name'], $tmp_file)) {
$result = pdf2text($uploadedFile);
echo substr($result, 0, 200);
echo "<BR>";
}
}
and in the next script
if(isValid() === true)
{
$tmp_file = $_POST['tmp_file_name'];
$file_name = $_POST['file_name'];
move_uploaded_file($tmp_file, PERMANENT_PATH . $file_name);
}
this is just mock code, but should give you a better idea.

Answer 2

Move the uploaded file with:
move_uploaded_file( $uploadedFile, "some/where/temp.pdf" );
...and create a hidden form field containing the new filename (some/where...).