This is my current loop to display my products via woocommerce. When I do print_r($category_array); It returns the array, but when I try to use a function to call it so I can do what I want to with the data, it makes and my entire screen doesn't display after the loop. Maybe it's a mistake in my function? Still very new to woocommerce and wp_loops. Thank you

            <?php
            // WP_Query arguments
            $args = array(
                'p'                      => 'product',
                'post_type'              => array( 'product' ),
                'order'                  => 'ASC',
                'post_per_page' => 20,
            );

            // The Query
            $query = new WP_Query( $args );

            // The Loop
            if ( $query->have_posts() ) {
                while ( $query->have_posts() ) {
                    $query->the_post();
                    function filter_categories($categories) {
                            foreach ($categories as $category) {
                                echo $category->name;
                            }
                    }


                    ?>
                    <div class="row">
                        <div class="col-2">
                            <?php echo the_post_thumbnail(get_the_ID(), 'thumbnail'); ?>
                        </div>
                        <div class="col-7">
                            <a href="<?= get_permalink(); ?>"><?= the_title()?></a>
                            <br/>
                            <?php
                            $category_array = get_the_terms(get_the_ID(), 'product_cat');
                            filter_categories($category_array);
                            ?>
                        </div>
                        <div class="col-3 text-right ">Price</div>
                    </div>
                    <?php
                }
            } else {
                // no posts found
            }

            // Restore original Post Data
            wp_reset_postdata();
            ?>

This is my current loop to display my products via woocommerce. When I do print_r($category_array); It returns the array, but when I try to use a function to call it so I can do what I want to with the data, it makes and my entire screen doesn't display after the loop. Maybe it's a mistake in my function? Still very new to woocommerce and wp_loops. Thank you

            <?php
            // WP_Query arguments
            $args = array(
                'p'                      => 'product',
                'post_type'              => array( 'product' ),
                'order'                  => 'ASC',
                'post_per_page' => 20,
            );

            // The Query
            $query = new WP_Query( $args );

            // The Loop
            if ( $query->have_posts() ) {
                while ( $query->have_posts() ) {
                    $query->the_post();
                    function filter_categories($categories) {
                            foreach ($categories as $category) {
                                echo $category->name;
                            }
                    }


                    ?>
                    <div class="row">
                        <div class="col-2">
                            <?php echo the_post_thumbnail(get_the_ID(), 'thumbnail'); ?>
                        </div>
                        <div class="col-7">
                            <a href="<?= get_permalink(); ?>"><?= the_title()?></a>
                            <br/>
                            <?php
                            $category_array = get_the_terms(get_the_ID(), 'product_cat');
                            filter_categories($category_array);
                            ?>
                        </div>
                        <div class="col-3 text-right ">Price</div>
                    </div>
                    <?php
                }
            } else {
                // no posts found
            }

            // Restore original Post Data
            wp_reset_postdata();
            ?>

• theme-development
• woocommerce-offtopic
• loop
• terms

• I noticed you didn't accept or comment on the answers to the previous questions you asked, can you go back and comment/accept on answers? People might not answer your questions if they think you won't give them reputation/votes – Tom J Nowell ♦ Commented Oct 5, 2020 at 21:12

1 Answer 1

The problem is here:

                while ( $query->have_posts() ) {
                    $query->the_post();
                    function filter_categories($categories) {
                            foreach ($categories as $category) {
                                echo $category->name;
                            }
                    }

You shouldn't declare a function inside a loop. Every time it loops around the filter_categories function gets declared again, but named functions can only be declared once, so it crashes the second time round, and everything stops.

If you look in your PHP error log, you should see an error message about redeclaring filter_categories confirming this.