Require Minimum Comment Length
Paste this code into your WordPress functions.php file to require a minimum comment length. Adjust the ’20’ to set the required characters.
/** * Snippet Name: Require Minimum Comment Length * Snippet URL: https://wpcustoms.net/snippets/require-minimum-comment-length/ */ 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; }