<?php
	// Check if post has atleast one image
	function get_first_image($post_content) {
	  $first_img = '';
	  $output = preg_match_all('/<img.+src=[\'"]([^\'"]+)[\'"].*>/i', $post_content, $matches);
	  $first_img = $matches [1] [0];
	  return $first_img;
	}

?>