Quick script to clean up file names in a directory

file-name-formatter.php

<?php

/*
|---------------------------------------------------------------------
| Rename Files
|---------------------------------------------------------------------
|
| This is a simple script to renames files in the current directory.
| It converts filenames to lowercase, removes non-alphanumeric
| characters and converts spaces to dashes.
|
*/

$files = array_diff(scandir('./'), ['..', '.', 'file-name-formatter.php']);
$patterns = ['/[^A-Za-z0-9 ]/', '/ {2,}/', '/ /'];
$replacements = ['', ' ', '-'];

foreach ($files as $file) {
    if (is_dir($file)) {
        echo "Skipping directory $file\n";
        continue;
    }

    $pathInfo = pathinfo($file);
    $newFilename = preg_replace($patterns, $replacements, strtolower($pathInfo['filename']));
    $newBasename = $newFilename . "." . $pathInfo['extension'];
    rename($file, $newBasename);

    echo "File renamed to: $newBasename\n";
}