PHP Use of existing global search against uploaded files - php

Question

I have included an upload script, which currently ONLY checks the upload folder to make sure that the file isn't there, which works just fine. However, I would like to somehow silently include a search function to see if it is already in one of the other directories.
The process: User uploads a prl, it checks upload folder if its there. This works. I need it to check another directory (recursively) to see if it is in any subdirectory already, and then list them out.
Just a note: $carrier is an existing subdirectory. I would like it to check the parent directory and all of its subs for the filename minus the extension, and if it exists, Error: this file already exists for "this" carrier.
<?php
$allowedExts = array("prl");
$temp = explode(".", $_FILES["file"]["name"]);
$extension = end($temp);
$carrier = $_POST['carrier'];
if ($_FILES["file"]["error"] > 0)
{
echo "Return Code: " . $_FILES["file"]["error"] . "<br>";
}
if (file_exists("./prls/" . $carrier . "/" . $_FILES["file"]["name"])){
echo "<h2><u>Error:</u></h2>";
echo $_FILES["file"]["name"] . " is already listed in the " . $carrier . " directory. ";
echo "<hr><br />If you feel this PRL is listed incorrectly, please let us know.";
die;
}
if (file_exists("upload/" . $_FILES["file"]["name"] . "-" .$carrier)) {
echo "<h2><u>Error:</u></h2>";
echo $_FILES["file"]["name"] . " for <b>" . $carrier . "</b> has already beeb submitted for approval. ";
die;
}
if ($_FILES["file"]["error"] == 0 && in_array($extension, $allowedExts))
{
move_uploaded_file($_FILES["file"]["tmp_name"],
"upload/" . $_FILES["file"]["name"] . "-" . $carrier);
echo "<h2><u>Submitted for approval:</u></h2>";
echo $_FILES["file"]["name"] . " for " . $carrier . ". <b>Thank you</b>.";
}
else
{
echo "Invalid file. Please choose a PRL with a \".prl\" extension.";
}
?>

Answer 1

You want to use RecursiveIteratorIterator. Here's a function that will behave like file_exists():
function file_exists_recursive($dir, $filename) {
$iterator = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($dir), RecursiveIteratorIterator::SELF_FIRST );
foreach($iterator as $path) {
if (!$path->isDir()) {
if(file_exists($filename.$path->__toString()))
return true;
}
return false;
}
}
Then call this function in your file:
if (file_exists_recursive("upload/", $_FILES["file"]["name"] . "-" .$carrier)) {
echo "<h2><u>Error:</u></h2>";
echo $_FILES["file"]["name"] . " for <b>" . $carrier . "</b> has already beeb submitted for approval. ";
die;
}