PHP & MySQL - You have an error in your SQL syntax problem

[hallo524]

I get this error below and was wondering what is it? And what can I do to fix it?You have an error in your SQL syntax; check the manual that correspondsto your MySQL server version for the right syntax to use near ') AND articles_comments.user_id IN()' at line 6Here is my MySQL code.\[code\]$u_id2 = array();$dbc = mysqli_query($mysqli,"SELECT users.user_id FROM users WHERE users.active IS NOT NULL OR users.deletion = 1");if(!$dbc){ print mysqli_error($mysqli);} else { while($row = mysqli_fetch_assoc($dbc)) { $u_id2[] = $row['user_id']; }}$bad_com_id2 = array();$dbc = mysqli_query($mysqli,"SELECT articles_comments.comment_id FROM articles_comments WHERE articles_comments.user_id IN(" . implode(",", $u_id2) . ") AND articles_comments.parent_comment_id = 0");if(!$dbc){ print mysqli_error($mysqli);} else { while($row = mysqli_fetch_assoc($dbc)) { $bad_com_id2[] = $row['comment_id' ]; }}$com_id2 = array();$ucom_id2 = array();$dbc = mysqli_query($mysqli,"SELECT articles_comments.comment_id, articles_comments.user_id FROM articles_comments WHERE articles_comments.article_id = '" . $article_id . "'");if(!$dbc){ print mysqli_error($mysqli);} else { while($row = mysqli_fetch_assoc($dbc)) { $com_id2[] = $row['comment_id' ]; $ucom_id2[] = $row['user_id']; }} $comments_to_be_displayed2 = array_diff($ucom_id2, $u_id2);$new_com_id2 = array();$dbc = mysqli_query($mysqli,"SELECT articles_comments.comment_id FROM articles_comments INNER JOIN users ON articles_comments.user_id = users.user_id INNER JOIN users_articles ON articles_comments.article_id = users_articles.id WHERE articles_comments.article_id = '" . $article_id . "' AND articles_comments.comment_id IN(" . implode(",", $com_id2) . ") AND articles_comments.user_id IN(" . implode(",", $comments_to_be_displayed2) . ")");if(!$dbc){ print mysqli_error($mysqli);} else { while($row = mysqli_fetch_assoc($dbc)) { $new_com_id2[] = $row['comment_id' ]; }}\[/code\]