Welcome to therichpost.com. In this post, I will tell you, How to Require minimum comment length for post in wordpress? Like I always say WordPress is the best cms.

Here is the working and tested wordpress hook for Require minimum comment length for post in wordpress and you need to add this into your theme’s functions.php file:

add_filter( 'preprocess_comment', 'minimal_comment_length' );
function minimal_comment_length( $commentdata ) {
     $minimalCommentLength = 20;
     if ( strlen( trim( $commentdata['comment_content'] ) ) < $minimalCommentLength ){
       wp_die( 'All comments must be at least ' . $minimalCommentLength . ' characters long.' );
     }
     return $commentdata;
}

 There are so many hooks in wordpress and i will let you know all. Please do comment if you any query related     to this post. Thank you. Therichpost.com