PHP & MySQL display problem

[stanic]

My script is supposed to find all related posts from the current posts categories which can be one or many categories but I want to stop the script from displaying the current post as a related post. How can I do this? And where do I add it to my script?Here is my MySQL table.\[code\]CREATE TABLE categories ( id INT UNSIGNED NOT NULL AUTO_INCREMENT, parent_id INT UNSIGNED NOT NULL DEFAULT 0, category VARCHAR(255) NOT NULL, url VARCHAR(255) NOT NULL,PRIMARY KEY (id), INDEX parent (parent_id),UNIQUE KEY(parent_id, url));CREATE TABLE users_posts (id INT UNSIGNED NOT NULL AUTO_INCREMENT,user_id INT UNSIGNED NOT NULL,title TEXT NOT NULL,summary TEXT DEFAULT NULL,post_content LONGTEXT NOT NULL,PRIMARY KEY (id));\[/code\]Here is my script forgive the mess.\[code\]$posts_categories = array();$ac_query = mysqli_query($mysqli, "SELECT category_id FROM posts_categories WHERE post_id = '" . $post_id . "'");if (!$ac_query) { print mysqli_error($mysqli);} else { while($row = mysqli_fetch_array($ac_query)){ $posts_categories[] = $row['category_id']; }}$posts_categories_name = array();$acn_query = mysqli_query($mysqli, "SELECT category FROM categories WHERE id IN(" . implode(',', $posts_categories) . ")"); if (!$acn_query) { print mysqli_error($mysqli);} else { while($row = mysqli_fetch_array($acn_query)){ $posts_categories_name[] = $row['category']; }}$x2 = '';$c2 = '';foreach($posts_categories_name as $acn) { $x2++; if($x2 == 1){ $c2 .= " users_posts.title LIKE '%$acn%' OR users_posts.summary LIKE '%$acn%' OR users_posts.post_content LIKE '%$acn%'"; } else { $c2 .= " OR users_posts.title LIKE '%$acn%' OR users_posts.summary LIKE '%$acn%' OR users_posts.post_content LIKE '%$acn%'"; }}$rac_query = mysqli_query($mysqli, "SELECT * FROM users_posts WHERE $c2 ORDER BY RAND() LIMIT 5");if (!$rac_query) { print mysqli_error($mysqli);} else { while($row = mysqli_fetch_array($rac_query)){ echo '<li>' . $purifier->purify(strip_tags($row['title'])) .'</li>'; }}\[/code\]