Use placeholders and $wpdb->prepare(); found interpolated variable $in_ids at AND meta_key IN ('{$in_ids}')


Use placeholders and $wpdb->prepare(); found interpolated variable $quiz_ids_str at WHERE quiz_id IN ({$quiz_ids_str}) 


Found unescaped literal "%" character.

Use placeholders and $wpdb->prepare(); found interpolated variable $assignment_ids_str at AND comment_post_ID IN({$assignment_ids_str});


Assignments must be the first block of code on a line

Missing parameter comment

Doc comment for parameter "$post_type" missing

Use placeholders and $wpdb->prepare(); found $post_type

Use placeholders and $wpdb->prepare(); found ?

Use placeholders and $wpdb->prepare(); found interpolated variable $post_type at " AND items.post_type='{$post_type}' "