Using PHP to get a list of files from a directory and all its subdirectories

fileHelper.php

<?php

    /**
     * A little helper function get all file names from a directory.
     */

    function testFiles() {
        //Initialize a starting point
        $path = getcwd() . "/public/images";
        $filesArr = array();


        $this->getFiles($path, $filesArr);

        print_r($filesArr);
    }

    /**
     * Recursive function to get list of all files including from subdirs for a given directory
     * 
     * @param string $path path to explore the files from 
     * @param array &$filesArr pass by reference variable to push files to the array
     * @param bool $includePath if set to true the entire path for the path is included, else just the filename
     */
    function getFiles($path, &$filesArr, $includePath = false) {
        if ($handle = opendir($path)) {
            while (false !== ($entry = readdir($handle))) {
                if ($entry != "." && $entry != "..") {
                    $currentPath = $path."/{$entry}";

                    //if the current path is a directory, recall the getFiles function and get
                    //all the files from this directory
                    if (is_dir($currentPath)) {
                        $this->getFiles($currentPath, $filesArr, $includePath);
                    } else {
                        $pathParts = pathinfo($currentPath);

                        //save off files that contain an extension
                        if (isset($pathParts['extension']) && strlen($pathParts['extension']) > 0) {
                            $entry = ($includePath) ? $currentPath : $entry;
                            $filesArr[] = $entry;
                        }
                    }
                }
            }
            closedir($handle);
        }
    }

?>