Something

<?php
																require('includes/connect.php');
																$did = $_GET['delete'];
																if(isset($did)) {
																$username = $_SESSION['username'];
																
																$query = mysql_query("SELECT * FROM `poem` WHERE `id` = '$did' AND `author` = '$username'") or die(mysql_error());
																
																if(mysql_num_rows($query)==1) {
																	$x=mysql_fetch_array($query);
																	$author = $x['author'];
																	$title = $x['title'];
																	if($author!=$username) {
																		mysql_query("DELETE FROM `poem` WHERE `id` = '$did' AND `author` = '$username'") or die(mysql_error());
																		echo "You have deleted the poem: $title";
																	} else {
																		echo 'You are not the author of this poem';
																	}
																}
																}															
																?>