Get WordPress Post Slug

getPostSlug.php

<?php

/**
 * Get post slug
 *
 * @param integer $objectId (Optional) Post ID
 * @param boolean $echo     (Optional) Whether to echo or return value.
 *
 * @return string
 * @access public
 */
function getSlug($objectId, $echo = false)
{
    if (empty($objectId)) {
        global $post;

        $objectId = $post->ID;
    }

    $postData = get_post($objectId, ARRAY_A);
    $slug = $postData['post_name'];

    return ($echo) ? _e($slug) : $slug;
}