Add custom comment form fields in WordPress ( Part 2 ) https://wpsites.net/web-design/add-remove-change-order-of-comment-form-default-fields/

functions.php

//* Save Custom Comment Form Field Meta Data
add_action( 'comment_post', 'save_custom_comment_field_data', 10, 1 );
function save_custom_comment_field_data( $comment_id ) {
  if ( ( isset( $_POST['industry'] ) ) && ( $_POST['industry'] != '') )
  $industry = wp_filter_nohtml_kses($_POST['industry']);
  add_comment_meta( $comment_id, 'industry', $industry );

  if ( ( isset( $_POST['title'] ) ) && ( $_POST['title'] != '') )
  $title = wp_filter_nohtml_kses($_POST['title']);
  add_comment_meta( $comment_id, 'title', $title );

}
/**
 * @author    Brad Dalton
 * @example   http://wpsites.net/web-design/add-remove-change-order-of-comment-form-default-fields/
 * @copyright 2014 WP Sites
 */
//* Add Custom Meta Boxes On Edit Comment Screen
add_action( 'add_meta_boxes_comment', 'wpsites_add_custom_comment_field_meta_boxes' );
function wpsites_add_custom_comment_field_meta_boxes() {
    add_meta_box( 'title', __( 'Title' ), 'wpsites_custom_comment_title_field_meta_box', 'comment', 'normal', 'high' );
	add_meta_box( 'industry', __( 'Industry' ), 'wpsites_custom_comment_industry_field_meta_box', 'comment', 'normal', 'high' );
}

function wpsites_custom_comment_title_field_meta_box( $comment ) {
    $title = get_comment_meta( $comment->comment_ID, 'wpsites_title_comment_field_data', true );
    wp_nonce_field( 'update_comment_title', 'update_comment_title', false );
    ?>
    <p>
        <label for="title"><?php _e( 'Title' ); ?></label>
        <input type="text" name="title" value="<?php echo esc_attr( $title ); ?>" class="widefat" />
    </p>
    <?php
}

function wpsites_custom_comment_industry_field_meta_box( $comment ) {
    $industry = get_comment_meta( $comment->comment_ID, 'wpsites_industry_comment_field_data', true );
    wp_nonce_field( 'update_comment_industry', 'update_comment_industry', false );
    ?>
    <p>
        <label for="industry"><?php _e( 'Industry' ); ?></label>
        <input type="text" name="industry" value="<?php echo esc_attr( $industry ); ?>" class="form-table editcomment" />
    </p>
    <?php
}


add_action( 'edit_comment', 'update_edit_comment' );
function update_edit_comment( $comment_id ) {
    if( ! isset( $_POST['update_comment_title'] ) || ! wp_verify_nonce( $_POST['update_comment_title'], 'update_comment_title' ) ) return;
    if( isset( $_POST['title'] ) )
	    update_comment_meta( $comment_id, 'title', esc_attr( $_POST['title'] ) );
	if( ! isset( $_POST['update_comment_industry'] ) || ! wp_verify_nonce( $_POST['update_comment_industry'], 'update_comment_industry' ) ) return;
    if( isset( $_POST['title'] ) )
		update_comment_meta( $comment_id, 'industry', esc_attr( $_POST['industry'] ) );
}

add_action('load-edit-comments.php', 'add_custom_fields_to_edit_comment_screen');
function add_custom_fields_to_edit_comment_screen() {
    $screen = get_current_screen();

    add_filter("manage_{$screen->id}_columns", 'add_custom_comment_columns');
}

function add_custom_comment_columns($cols) {
    $cols['industry'] = __('Industry', 'wpsites');
	$cols['title'] = __('Title', 'wpsites');
    return $cols;
}

add_action( 'manage_comments_custom_column', 'custom_title_column', 10, 2 );
function custom_title_column($col, $comment_id) {
   
    switch($col) {
        case 'title':
            if($tit = get_comment_meta($comment_id, 'title', true)){
                echo esc_html($tit);
            } else {
                esc_html_e('No Title Submitted', 'wpsites');
            }
    }
}

add_action( 'manage_comments_custom_column', 'custom_industry_column', 10, 2 );
function custom_industry_column($col, $comment_id) {
   
    switch($col) {
        case 'industry':
            if($ind = get_comment_meta($comment_id, 'industry', true)){
                echo esc_html($ind);
            } else {
                esc_html_e('No Industry Submitted', 'wpsites');
            }
    }
}

//* Output Custom Comment Field Data On Comment Form Front End
add_filter( 'comment_text', 'output_title_field_data_comment_form');
function output_title_field_data_comment_form( $text ){


  if( $title = get_comment_meta( get_comment_ID(), 'title', true ) ) {
    $title = '<strong>' . esc_attr( $title ) . '</strong><br/>';
    $text = $title . $text;
    return $text;
	}
  }
 
add_filter( 'comment_text', 'output_industry_field_data_comment_form');
function output_industry_field_data_comment_form( $text ){


  if( $industry = get_comment_meta( get_comment_ID(), 'industry', true ) ) {
    $industry = '<strong>' . esc_attr( $industry ) . '</strong><br/>';
    $text = $industry . $text;
    return $text;
	}
  }