PHP: getRandomImg from any directory! (Supports JPG/JPEG & PNG)

getRandomImage.php

<?php
/**
 * Picks one random jpg/jpeg/png format image from the specified directory.
 * @param  string  $dir      Images directory path.
 * @param  boolean $realPath True to return real path of the image.
 * @return string            Path to one random image.
 */
function getRandomImg ( $dir, $realPath = false ) {
  $dir = rtrim($dir, '/'); // Just in case if there is any trailing slash.
  $images = glob($dir . '/*.{jpg,jpeg,png}', GLOB_BRACE);
  shuffle($images);
  $image = $images[array_rand($images)];
  return ($realPath) ? realpath($image) : $image;
}

/**
 * Usage:
 * 
 * Pass the directory path from which the random image should be selected.
 * 
 * Example:
 * <?php
 * $image = getRandomImg('./uploads/images');
 * 
 * echo '<img src="'. $image .'" />';
 * ?>
 */