I want to get woocommerce reviews by product id and display it in a template

Question

I want to fetch woocommerce product reviews by product id or anything else and want to display it in a template created by me.

Answer 1

Woocommerce made a reviews out of regular wordpress comments.

The simple way is to get a comments of 'post_type' => 'product', that will get raw comment data. In order to display proper woocommerce review out of that you need to apply a callback function witch is 'callback' => 'woocommerce_comments'.

The whole thing is:

<?php
    $args = array ('post_type' => 'product');
    $comments = get_comments( $args );
    wp_list_comments( array( 'callback' => 'woocommerce_comments' ), $comments);
?>

If you want to get the comment by product ID then you need to change that $args:

$args = array ('post_id' => 123); 

To customize it more check out that references:

http://codex.wordpress.org/Function_Reference/wp_list_comments http://codex.wordpress.org/get_comments

The 'callback' => 'woocommerce_comments' function uses a template located in plugins/woocomerce/templates/single-product/review.php

Answer 2

I have been recently having the same struggle and I came up with this solution that allows you to output reviews from all products on a single page.

//Display all product reviews
if (!function_exists('display_all_reviews')) {
function display_all_reviews(){
    $args = array(
       'status' => 'approve',
       'type' => 'review'
    );

    // The Query
    $comments_query = new WP_Comment_Query;
    $comments = $comments_query->query( $args );

    // Comment Loop
    if ( $comments ) {
        echo "<ol>";
        foreach ( $comments as $comment ): ?>
        <?php if ( $comment->comment_approved == '0' ) : ?>
            <p class="meta waiting-approval-info">
                <em><?php _e( 'Thanks, your review is awaiting approval', 'woocommerce' ); ?></em>
            </p>
            <?php endif;  ?>
            <li itemprop="reviews" itemscope itemtype="http://schema.org/Review" <?php comment_class(); ?> id="li-review-<?php echo $comment->comment_ID; ?>">
                <div id="review-<?php echo $comment->comment_ID; ?>" class="review_container">
                    <div class="review-avatar">
                        <?php echo get_avatar( $comment->comment_author_email, $size = '50' ); ?>
                    </div>
                    <div class="review-author">
                        <div class="review-author-name" itemprop="author"><?php echo $comment->comment_author; ?></div>
                        <div class='star-rating-container'>
                            <div itemprop="reviewRating" itemscope itemtype="http://schema.org/Rating" class="star-rating" title="<?php echo esc_attr( get_comment_meta( $comment->comment_ID, 'rating', true ) ); ?>">
                                <span style="width:<?php echo get_comment_meta( $comment->comment_ID, 'rating', true )*22; ?>px"><span itemprop="ratingValue"><?php echo get_comment_meta( $comment->comment_ID, 'rating', true ); ?></span> <?php _e('out of 5', 'woocommerce'); ?></span>

                                    <?php
                                        $timestamp = strtotime( $comment->comment_date ); //Changing comment time to timestamp
                                        $date = date('F d, Y', $timestamp);
                                    ?>
                            </div>
                            <em class="review-date">
                                <time itemprop="datePublished" datetime="<?php echo $comment->comment_date; ?>"><?php echo $date; ?></time>
                            </em>
                        </div>
                    </div>
                    <div class="clear"></div>
                    <div class="review-text">
                        <div itemprop="description" class="description">
                            <?php echo $comment->comment_content; ?>
                        </div>
                        <div class="clear"></div>
                    </div>
                <div class="clear"></div>           
            </div>
        </li>

        <?php 
        endforeach;
        echo "</ol>";
    } else {
        echo "This product hasn't been rated yet.";
    }
}
}

Add the above function to your functions.php file. After this you can use this function on your theme wherever you would like by calling it like this:

<?php echo display_all_reviews(); ?>

I also created a tutorial here https://www.majas-lapu-izstrade.lv/get-woocommerce-customer-reviews-from-all-products-display-average-and-all-ratings-in-a-histogram-without-a-plugin/ that also includes functions to output average product rating, total count of all ratings from all products and all product review histogram.