How to count total number of Rating from the Extend Comment Plugin? - php

Question

I got a WordPress Rating plugin from "http://www.smashingmagazine.com/2012/05/08/adding-custom-fields-in-wordpress-comment-form/"
I would like to count the total number of rating and print that number under the Blog Post. Is this possible?
I added some customisation in this code.
<?php
// Add fields after default fields above the comment box, always visible
add_action( 'comment_form_logged_in_after', 'additional_fields' );
add_action( 'comment_form_after_fields', 'additional_fields' );
function additional_fields () {
echo '<p class="comment-form-rating">'.
'<label for="rating">'. __('Rating') . '<span class="required">*</span></label>
<span class="commentratingbox">';
for( $i=1; $i <= 5; $i++ )
echo '<span class="commentrating"><input type="radio" checked name="rating" id="rating" value="'. $i .'"/>'. $i .' Star</span>';
echo'</span></p>';
}
// Save the comment meta data along with comment
add_action( 'comment_post', 'save_comment_meta_data' );
function save_comment_meta_data( $comment_id ) {
if ( ( isset( $_POST['rating'] ) ) && ( $_POST['rating'] != '') )
$rating = wp_filter_nohtml_kses($_POST['rating']);
add_comment_meta( $comment_id, 'rating', $rating );
}
// Add the filter to check if the comment meta data has been filled or not
add_filter( 'preprocess_comment', 'verify_comment_meta_data' );
function verify_comment_meta_data( $commentdata ) {
if ( ! isset( $_POST['rating'] ) )
wp_die( __( 'Error: You did not add your rating. Hit the BACK button of your Web browser and resubmit your comment with rating.' ) );
return $commentdata;
}
//Add an edit option in comment edit screen
add_action( 'add_meta_boxes_comment', 'extend_comment_add_meta_box' );
function extend_comment_add_meta_box() {
add_meta_box( 'title', __( 'Comment Metadata - Extend Comment' ), 'extend_comment_meta_box', 'comment', 'normal', 'high' );
}
function extend_comment_meta_box ( $comment ) {
$phone = get_comment_meta( $comment->comment_ID, 'phone', true );
$title = get_comment_meta( $comment->comment_ID, 'title', true );
$rating = get_comment_meta( $comment->comment_ID, 'rating', true );
wp_nonce_field( 'extend_comment_update', 'extend_comment_update', false );
?>
<p>
<label for="rating"><?php _e( 'Rating: ' ); ?></label>
<span class="commentratingbox">
<?php for( $i=1; $i <= 5; $i++ ) {
echo '<span class="commentrating"><input type="radio" name="rating" id="rating" value="'. $i .'"';
if ( $rating == $i ) echo ' checked="checked"';
echo ' />'. $i .' </span>';
}
?>
</span>
</p>
<?php
}
// Update comment meta data from comment edit screen
add_action( 'edit_comment', 'extend_comment_edit_metafields' );
function extend_comment_edit_metafields( $comment_id ) {
if( ! isset( $_POST['extend_comment_update'] ) || ! wp_verify_nonce( $_POST['extend_comment_update'], 'extend_comment_update' ) ) return;
if ( ( isset( $_POST['phone'] ) ) && ( $_POST['phone'] != '') ) :
$phone = wp_filter_nohtml_kses($_POST['phone']);
update_comment_meta( $comment_id, 'phone', $phone );
else :
delete_comment_meta( $comment_id, 'phone');
endif;
if ( ( isset( $_POST['title'] ) ) && ( $_POST['title'] != '') ):
$title = wp_filter_nohtml_kses($_POST['title']);
update_comment_meta( $comment_id, 'title', $title );
else :
delete_comment_meta( $comment_id, 'title');
endif;
if ( ( isset( $_POST['rating'] ) ) && ( $_POST['rating'] != '') ):
$rating = wp_filter_nohtml_kses($_POST['rating']);
update_comment_meta( $comment_id, 'rating', $rating );
else :
delete_comment_meta( $comment_id, 'rating');
endif;
}
// Add the comment meta (saved earlier) to the comment text
// You can also output the comment meta values directly in comments template
add_filter( 'comment_text', 'modify_comment');
function modify_comment( $text ){
$plugin_url_path = WP_PLUGIN_URL;
if( $commenttitle = get_comment_meta( get_comment_ID(), 'title', true ) ) {
$commenttitle = '<strong>' . esc_attr( $commenttitle ) . '</strong><br/>';
$text = $commenttitle . $text;
}
if( $commentrating = get_comment_meta( get_comment_ID(), 'rating', true ) ) {
$commentrating = '<p class="comment-rating"> <img src="'. $plugin_url_path .
'/ExtendComment/images/'. $commentrating . 'star.gif"/><br/>Rating: <strong>'. $commentrating .' / 5</strong></p>';
$text = $text . $commentrating;
return $text;
} else {
return $text;
}
}

Answer 1

It would go something like this. Appending the total for all ratings:
if( !is_admin() )
add_filter( 'the_content', 'content_so_23778986' );
function content_so_23778986( $content )
{
if( !is_single() )
return $content;
# Get all comments from current post
$comms = get_comments( array( 'post_id'=>get_the_ID() ) );
$counter = null;
if( $comms )
{
$total = count( $comms );
# Iterate all comments and add its rating to the counter
foreach( $comms as $c )
{
$rating = (int) get_comment_meta( $c->comment_ID, 'rating', true );
$counter += $rating;
}
# Calculate and print the totals
$counter = '<br />' . $counter / $total . ' de 5';
}
return $content . $counter;
}