Grab images from any directory

<?php

$directory = "work"; // Directory where the images are located:
$myFiles = scandir($directory); // Grab a listing of you files:
$allowedExts = ["jpg", "jpeg", "gif", "png"]; // Allowed image extensions:
for ($i = 0; $i < count($myFiles); $i++) {
    /*
     * Obmit the . and .. in the directory
     */
    if ($myFiles[$i] !== '.' && $myFiles[$i] !== '..') {
        $ext = strtolower(pathinfo($myFiles[$i], PATHINFO_EXTENSION)); // Grab the extension of the file(s):
        if (in_array($ext, $allowedExts)) {
            $path_parts = pathinfo($myFiles[$i]);
            $file_name[] = $path_parts['filename'];
        }

    }
}

$num_files = count($file_name); // Number of images in lib/images/slideshow directory:

echo "<pre>" . print_r($file_name, 1) . "</pre>";