DediData

<?php
/*
 * Display Image from the_post_thumbnail or the first image of a post else display a default Image
 * Chose the size from "thumbnail", "medium", "large", "full" or your own defined size using filters.
 * USAGE: <?php echo get_post_image_url(); ?>
 */

function get_post_image_url($size = 'full') {
	if (has_post_thumbnail()) {
		$image_id = get_post_thumbnail_id();