List files not in database - php

Question

I have a database files for holding details about files in different folders and the field flink holds the path of the file.Now i want to run a search both in the folder and database and find the files that are not listed in the database.Is this possible using PHP MYSQL.I have written a sample code but it doesnt seem to work.Please note that files folder contains number of subdirectories as well.
<?php
include("dbfiles.php");
$directory='files/';
// Query database
$query = 'SELECT `flink` FROM `files`';
$result = mysqli_query($fmysqli, $query);
$db = []; // create empty array
while ($row = mysqli_fetch_row($result))
array_push($db, $row[0]);
// Check files
$files1 = scandir($directory);
if ( $files1 !== false ) {
foreach ($files1 as $i => $value) {
if (in_array($value, $db)) {
// File exists in both
echo ' Exists '.$value;
} else {
// File doesn't exist in database
echo ' Not Exists '.$value;
}
}
} else {
echo 0;
}
?>
The result is something unexpected there is a file inside BT363 Folder the path is as follows files/BT363/BT363-Metabolic Engineering and Synthetic Biology-Class Slide--Module 4-admin-admin.pptx
But i am getting the output as
Not Exists . Not Exists .. Not Exists BT363

Answer 1

You can list all the files in a directory by doing this:
$files = scandir($path);
Then query your database for the file information you want and then loop through it and compare the current iteration and find that value in $files.

Answer 2

Yes, it is possible.
Due to the extreme lack of specific detail in your question, my response is going to be equally non-specific.
You'll want to compile a list of files from your folder using glob, scandir or similar. Likewise you will want to compile a list of files in the database.
Compare the two to identify those in the folder, but not in the database.
Edit
The output you're getting . and .. are because filesystems have links to the current (.) and parent (..) directory. Typically you write code to skip these values.
For example, taking your code:
$files1 = scandir($directory)
if ($files1) {
foreach ($files1 as $value) {
if (in_array($value, ['.', '..'])) continue;
// Your other code...
}
}