get_field() does not work inside my foreach loop - wordpress

I've made a custom field for my product categories so that I could select icons accordingly using ACF plugin. I called all the categories like this (But the values of the custom fields return nothing as I've tried var_dumping it):
<?php
$orderby = 'date';
$order = 'DESC';
$hide_empty = false ;
$cat_args = array(
'orderby' => $orderby,
'order' => $order,
'hide_empty' => $hide_empty,
);
$product_categories = get_terms( 'product_cat', $cat_args );
if( !empty($product_categories) ){
foreach ($product_categories as $key => $category) {
$icon = get_field('icon_classname');
if (empty($icon)) { $icon = 'flaticon-002-coat'; }
?>
<div class="cat-item">
<div class="cat cat-1">
<div class="cat-wrap">
<a class="category" href="<?php echo get_term_link($category); ?>">
<i class="icon fimanager <?php echo $icon; ?>"></i>
<span class="cat-title"><?php echo $category->name; ?></span>
</a>
</div>
</div>
</div>
<?php
} wp_reset_postdata();
}
?>

please check it :
you should replace these two lines :
foreach( $product_categories as $cat) {
$icon = get_field('icon_classname', 'category_'.$cat->term_id);

Related

How can I change how my WordPress theme displays categories? I want to display subcategories under parent category

I'm trying to hide sub-categories under categories, but I'm not able to. I'm looking to create a follow menu. How can I do that?
add_action('zigcy_lite_product_cat_menu','zigcy_lite_add_browse_categories_nav_menu_items');
if ( ! function_exists( 'zigcy_lite_add_browse_categories_nav_menu_items' ) ) {
function zigcy_lite_add_browse_categories_nav_menu_items() {
if ( ! class_exists( 'WooCommerce' ) )
return;
$product_categories = get_terms( 'product_cat');
$count = count($product_categories);
?>
<div class="browse-category-wrap">
<div class="browse-category">
<i class="lnr lnr-menu"></i>
<?php esc_html_e('Shop by Gender','zigcy-lite'); ?>
</div>
<div class="categorylist">
<ul>
<?php
foreach( $product_categories as $product_category ) {
$cat_name = $product_category->name;
$cat_id = $product_category->term_id;
?>
<li><?php echo esc_html($cat_name); ?> </li>
<?php } ?>
</ul>
</div>
</div>
<?php
}
}
Menu shown here:
Check the get_terms reference at: https://codex.wordpress.org/Function_Reference/get_terms
You can pass the "parent" argument to only get the top level categories:
$args = array( 'taxonomy' => 'product_cat', 'hide_empty' => true, 'parent' => 0 );
$product_categories = get_terms('product_cat', $args);
foreach ($product_categories as $term) {
echo '<li>' . $term->name . ' ('.$term->count.')</li>';
}

Get grouped product highest price woocommerce

I am trying to get grouped products highest price so that i can show only highest price on custom template page.I am using WP_Query to get list of products.
Here is the snippet:
$series_term = $_GET['series'];
$args=array(
'series' => $term_name->slug,
'post_type' => 'product',
'posts_per_page' => 8,
'filter' =>$valuecol,
'tax_query' => array(
array(
'taxonomy' => 'product_cat',
'field' => 'slug',
'terms' => array( 'hidden' ), // Don't display products in the knives category on the shop page
'operator' => 'NOT IN'
)
)
);
// $do_not_duplicate[] = $post->ID;
$my_query = null;
$my_query = new WP_Query($args);
/* Start the Loop */
while ($my_query->have_posts()) : $my_query->the_post();
$feat_prod_img = wp_get_attachment_image_src(get_post_thumbnail_id(), 'post-thumb-single');
$feat_product_img = wp_get_attachment_url( get_post_thumbnail_id($my_query->post->ID) );
?>
<div class="col-md-3 col-sm-4 col-xs-6">
<div class="product-detail">
<div class="product-thmbnial">
<a href="<?php the_permalink(); ?>">
<img src="<?php $src=$feat_product_img; echo image_product_resize_crop( $src, $w=440, $h=275, $dest = null, $override = false, $createNewIfExists = false ); ?>" alt="<?php the_title(); ?>"/>
</a>
</div>
<div class="info"><p><?php the_title(); ?><br/>
<span>
<?php $wp_product = new WC_Product( get_the_ID() );
echo get_woocommerce_currency_symbol(); ?></sup><?php
echo $wp_product->get_price();?></span></p></div>
</div>
</div>
<?php endwhile; ?>
I want grouped product highest price to show in place of $wp_product->get_price();
I tried to get children products and but the array is empty.
foreach ( $wp_product->get_children() as $child_id ) {
$child_prices[] = get_post_meta( $child_id, '_price', true );
}
can anyone suggest me how i can get highest price.
Thanks in advance.
I found the solution.. I tried the same solution earlier but that time it wasn't working.
Here is the fix:
$series_term = $_GET['series'];
$args=array(
'series' => $term_name->slug,
'post_type' => 'product',
'posts_per_page' => 8,
'filter' =>$valuecol,
'tax_query' => array(
array(
'taxonomy' => 'product_cat',
'field' => 'slug',
'terms' => array( 'hidden' ), // Don't display products in the knives category on the shop page
'operator' => 'NOT IN'
)
)
);
// $do_not_duplicate[] = $post->ID;
$my_query = null;
$my_query = new WP_Query($args);
/* Start the Loop */
while ($my_query->have_posts()) : $my_query->the_post();
$feat_prod_img = wp_get_attachment_image_src(get_post_thumbnail_id(), 'post-thumb-single');
$feat_product_img = wp_get_attachment_url( get_post_thumbnail_id($my_query->post->ID) );
?>
<div class="col-md-3 col-sm-4 col-xs-6">
<div class="product-detail">
<div class="product-thmbnial">
<a href="<?php the_permalink(); ?>">
<img src="<?php $src=$feat_product_img; echo image_product_resize_crop( $src, $w=440, $h=275, $dest = null, $override = false, $createNewIfExists = false ); ?>" alt="<?php the_title(); ?>"/>
</a>
</div>
<div class="info"><p><?php the_title(); ?><br/>
<span>
<?php $wp_product = new WC_Product( get_the_ID() );
$child_prices = array();
foreach ( $product->get_children() as $child_id ) {
$child_prices[] = get_post_meta( $child_id, '_price', true );
}
$child_prices = array_unique( $child_prices );
if ( ! empty( $child_prices ) ) {
$min_price = min( $child_prices );
$max_price = max( $child_prices );
} else {
$min_price = '';
$max_price = '';
}
if($min_price == $max_price && !empty($min_price))
{
echo get_woocommerce_currency_symbol(); ?></sup><?php
echo $min_price;
}
elseif(!empty($max_price))
{
echo get_woocommerce_currency_symbol(); ?></sup><?php
echo $max_price;
}
else
{
echo get_woocommerce_currency_symbol(); ?></sup><?php
echo $wp_product->get_price();
}
?></span></p></div>
</div>
</div>
<?php endwhile; ?>

WordPress shortcode show some mistake

Which is show category post. But it has some mistake .please anyone fix it .
This my WordPress shortcode
function my_form_shortcode($atts) {
ob_start();
$atts = shortcode_atts(
array(
'cat' => '1',
'showposts' => '5',
), $atts, 'my_form_shortcode' );
//YOUR CODE START
$recent = new WP_Query();
$query = "cat=".$atts['cat']."&showposts=".$atts['showposts'];
$recent->query( $query );
$is_first_post = true;
while( $recent->have_posts() ) : $recent->the_post(); ?>
<div class="panel-heading"><?php the_category(', '); ?></div>
<ul class="panel-grid">
<li class="ex">
<?php
if ( $is_first_post && has_post_thumbnail() ) {
the_post_thumbnail( 'image', array( 'class' => 'img-responsive' ));
$is_first_post = false;
}
?>
<a href="<?php the_permalink(); ?>">
<?php the_title(); ?>
</a>
</li>
</ul>
<?php endwhile;
//YOUR CODE END
return ob_get_clean();
}
add_shortcode( 'my_form_shortcode', 'my_form_shortcode' );
In this code category title name show before all post. But I want to show category title before only 1st post. Whats the wrong in this code. Please, help me ..
try this...
https://developer.wordpress.org/reference/functions/get_the_category_by_id/
function get_the_category_by_ID( $cat_ID ) {
$cat_ID = (int) $cat_ID;
$category = get_term( $cat_ID, 'category' );
if ( is_wp_error( $category ) )
return $category;
return ( $category ) ? $category->name : '';
}
Try This code:
<?php
function my_form_shortcode($atts) {
ob_start();
$atts = shortcode_atts(
array(
'cat' => '1',
'showposts' => '5',
), $atts, 'my_form_shortcode' );
//YOUR CODE START
$recent = new WP_Query();
$query = "cat=".$atts['cat']."&showposts=".$atts['showposts'];
$recent->query( $query );
$is_first_post = true; ?>
<div class="panel-heading"><?php the_category(', '); ?></div>
<?php while( $recent->have_posts() ) : $recent->the_post(); ?>
<ul class="panel-grid">
<li class="ex">
<?php
if ( $is_first_post && has_post_thumbnail() ) {
the_post_thumbnail( 'image', array( 'class' => 'img-responsive' ));
$is_first_post = false;
}
?>
<?php the_title(); ?>
</li>
</ul>
<?php endwhile;
//YOUR CODE END
return ob_get_clean();
}
add_shortcode( 'my_form_shortcode', 'my_form_shortcode' );

Display Posts Category Wise

I have code to show the latest 3 posts of every category and I want to exclude the child categories, but it doesn't exclude the sub category and it shows sub category separately and it show the latest 3 posts of sub category. Is there any way to exclude sub categories from loop.
Here is the code:
<?php
//start page loop
if (have_posts()) : while (have_posts()) : the_post();
//get meta to set parent category
$library_filter_parent = '';
$library_parent = get_post_meta($post->ID, 'wts_library_parent', true);
if($library_parent != 'select_library_parent') { $library_filter_parent = $library_parent; } else { $library_filter_parent = NULL; }
?>
<div id="library-by-category-wrap">
<?php
//get meta to set parent category
$library_filter_parent = '';
$library_parent = get_post_meta($post->ID, 'wts_library_parent', true);
if($library_parent != 'select_library_parent') { $library_filter_parent = $library_parent; } else { $library_filter_parent = NULL; };
//term loop
$terms = get_terms('library_cats','orderby=custom_sort&hide_empty=1&child_of='.$library_filter_parent.'');
foreach($terms as $term) { ?>
<div class="heading">
<h2><?php echo $term->name; ?></h2>
</div>
<div class="library-category">
<?php
//tax query
$tax_query = array(
array(
'taxonomy' => 'library_cats',
'terms' => $term->slug,
'field' => 'slug'
)
);
$term_post_args = array(
'post_type' => 'library',
'numberposts' => '3',
'tax_query' => $tax_query
);
$term_posts = get_posts($term_post_args);
//start loop
foreach ($term_posts as $post) : setup_postdata($post);
//get images
$featured_image = get_the_post_thumbnail($post->ID, 'cat-thumbnail'); ?>
<?php if(!empty($featured_image)) { ?>
<div class="library-item">
<a class="library-title" href="#" title="<?php the_title(); ?>" target="_blank">
<h3><?php the_title(); ?></h3>
</a>
</div>
<!-- /library-item -->
<?php } ?>
<?php endforeach; ?>
</div>
<!-- /library-category -->
<?php } wp_reset_postdata(); ?>
</div>
<!-- /library-by-category-wrap -->
<?php wp_reset_query(); ?>
<?php endwhile; endif; ?>
<?php
//get all terms (e.g. categories or post tags), then display all posts in each term
$taxonomy = 'category';// e.g. post_tag, category
$param_type = 'category__in'; // e.g. tag__in, category__in
$term_args=array(
'orderby' => 'name',
'order' => 'ASC'
);
$terms = get_terms($taxonomy,$term_args);
if ($terms) {
foreach( $terms as $term ) {
$args=array(
"$param_type" => array($term->term_id),
'post_type' => 'post',
'post_status' => 'publish',
'posts_per_page' => -1,
'caller_get_posts'=> 1
);
$my_query = null;
$my_query = new WP_Query($args);
if( $my_query->have_posts() ) {
echo 'List of Posts in '.$taxonomy .' '.$term->name;
while ($my_query->have_posts()) : $my_query->the_post(); ?>
<p><?php the_title(); ?></p>
<?php
endwhile;
}
}
}
wp_reset_query(); // Restore global post data stomped by the_post().
?>
Note see the Time Parameters in the query_posts() article.
<?php // get all the categories from the database
$cats = get_categories();
// loop through the categries
foreach ($cats as $cat) {
// setup the cateogory ID
$cat_id= $cat->term_id;
// Make a header for the cateogry
echo "<h2>".$cat->name."</h2>";
// create a custom wordpress query
query_posts(“cat=$cat_id&post_per_page=100");
if (have_posts()) : while (have_posts()) : the_post(); ?>
<?php // create our link now that the post is setup ?>
<?php the_title(); ?>
<?php echo '<hr/>'; ?>
<?php endwhile; endif;
// done our wordpress loop. Will start again for each category ?>
<?php } // done the foreach statement ?>
<?php
$catquery = new WP_Query( array( 'post_type' => 'testimonials', 'category_name'=>'hello','posts_per_page' => 10 ) );
while($catquery->have_posts()) : $catquery->the_post();
?>
<ul>
<li>
<h3>
<?php the_title(); ?>
</h3>
</li>
<li>
<?php the_content(); ?>
</li>
</ul>
<?php endwhile; ?>
$taxonomy = 'category';
$term_args = array(
'orderby' => 'name',
'order' => 'ASC',
'parent' => 0
);
$terms = get_terms($taxonomy, $term_args);
[homepage_cat_grid limit='3' cat_id='2']
add_shortcode( 'homepage_cat_grid', array($this, 'homepage_postgrid_shortcode') );
/**
* HOME PAGE CATEGORY WISE POST GRID
*/
public function homepage_postgrid_shortcode( $atts, $content ) {
extract( shortcode_atts( array (
'order' => '',
'orderby' => '',
'limit' => '',
'cat_id'=> ''
), $atts ) );
ob_start();
$args = array(
'post_type' => 'post',
'order' => $order,
'orderby' => $orderby,
'posts_per_page' => $limit,
'cat' => $cat_id
);
$home_post = new WP_Query( $args );
if( $home_post->have_posts() ) : ?>
<div class="post-header">
<div class="head-left">
<?Php
$terms = wp_get_post_terms($home_post->post->ID,'category');
$cat_nm=$terms[0]->name;
if($cat_nm=='News'): echo "Recent News"; else: echo $cat_nm; endif;
?>
</div>
<a href="<?php
$category_link = get_category_link( $terms[0]->term_id );
echo $category_link; ?>" class="btn post-head-btn">VIEW ALL</a>
</div>
<div class="row">
<?php while ( $home_post->have_posts() ) : $home_post->the_post(); ?>
<div class="col-md-4">
<div class="single-grid">
<a href="<?php echo get_permalink( $post->ID ); ?>">
<?php the_post_thumbnail( $post->ID ); ?>
</a>
<div class="post-caption">
<?php echo the_category(); ?>
<div class="post-heading">
<?php echo the_title(); ?>
</div>
<div class="post-content">
<?php the_excerpt(); ?>
</div>
<div class="row">
<div class="col-12">
<a class="btn btn-dark cust-btn" href="<?php echo get_permalink( $post->ID ); ?>">Read More</a>
</div>
</div>
</div>
</div>
</div>
<?php endwhile; wp_reset_query(); ?>
</div>
<?php else :
get_template_part( 'template-parts/content', 'none' );
endif;
return ob_get_clean();
}

Shortcode rendering as text not as shortcode should

I am building a shopping website and I am trying to put a shortcode in that will show the customer a buy button and the quantity of the product the customer wants to purchase. On my post page the shortcode works fine:
http://warringah-plastics.com.au/blog/dt_catalog/recess-gasket-large/
but on the archive page:
http://warringah-plastics.com.au/store/
the shortcode id displayed as text and not the actual button and quantity e.g. [add_to_cart item="FPROWAR-160713-1" showprice="no" quantity="user:1" ajax="yes" ].
The code that works in the post page is this:
<?php
$my_textbox_value = mtbxr_val("shopping_shortcode");
echo do_shortcode("$my_textbox_value");
?>
but it just displays the shortcode text on that archive page. Anyone have any ideas? Much appreciated,
UPDATE
THIS IS THE CODE THAT DISPLAYS THE SHORTCODE CORRECTLY:
<?php get_header(); ?>
<?php dt_storage('have_sidebar', true); ?>
<?php get_template_part('top-bg'); ?>
<?php get_template_part('parallax'); ?>
<div id="wrapper">
<?php get_template_part('nav'); ?>
<div id="container">
<?php if( have_posts() ): while( have_posts() ): the_post(); ?>
<h1><?php the_title(); ?></h1>
<h1 style="color: #3C3C3B !important; margin-top:-20px !important;"><?php $terms_as_text = strip_tags( get_the_term_list( $wp_query->post->ID, 'dt_catalog_category', '', ', ', '' ) );
echo $terms_as_text; ?></h1>
<?php
global $post;
$post_opts = get_post_meta($post->ID, '_dt_catalog-post_options', true);
if( !isset($post_opts['hide_media']) || (isset($post_opts['hide_media']) && !$post_opts['hide_media']) ) {
$args = array(
'post_type' => 'attachment',
'post_status' => 'inherit',
'posts_per_page' => -1,
'post_parent' => $post->ID,
'post_mime_type' => 'image',
'orderby' => 'menu_order',
'order' => 'ASC'
);
if( !empty($post_opts['hide_thumbnail']) )
$args['post__not_in'] = array( get_post_thumbnail_id() );
$dt_tmp_query = new WP_Query( $args );
if( $dt_tmp_query->have_posts() ) {
$slides = array();
foreach( $dt_tmp_query->posts as $slide ) {
$video = get_post_meta( $slide->ID, '_dt_catalog_video_link', true );
$tmp_arr = array();
$tmp_arr['caption'] = $slide->post_excerpt;
if ( ! $video ) {
$slide_src = dt_get_resized_img( wp_get_attachment_image_src( $slide->ID, 'full' ), array( 'w' => 710 ) );
$tmp_arr['alt'] = get_post_meta( $slide->ID, '_wp_attachment_image_alt', true );
$tmp_arr['src'] = $slide_src[0];
$tmp_arr['size_str'] = $slide_src[3];
} else {
$tmp_arr['is_video'] = true;
$tmp_arr['src'] = $video;
$tmp_arr['size_str'] = array( 710, 1024 );
}
$slides[] = $tmp_arr;
}
dt_get_anything_slider( array( 'id' => 'slider2', 'items_arr' => $slides ) );
}
}
?>
<?php $opts = get_post_meta($post->ID, '_dt_catalog-goods_options', true); ?>
<?php if( !empty($opts['price']) ): ?>
<span class="price"><?php _e('Price: ', LANGUAGE_ZONE); echo esc_html($opts['price']); ?></span>
<?php endif; ?>
<?php
$my_textbox_value = mtbxr_val("shopping_shortcode");
echo do_shortcode("$my_textbox_value");
?>
<?php
the_content();
if( dt_is_page_soc_buttons_enabled('catalog') ) {
dt_get_like_buttons( get_the_ID() );
}
?>
<?php if( !empty($opts['p_link']) ): ?>
<span><i class="dol"></i><?php _e('Make purchase!', LANGUAGE_ZONE); ?></span>
<?php endif; ?>
<p class="gap"></p>
<?php
$rel_works = get_post_meta($post->ID, '_dt_catalog_related', true);
if( isset($rel_works['show_related']) && $rel_works['show_related'] ):
if( 'same' == $rel_works['related'] ) {
$rel_works['related'] = wp_get_post_terms(
$post->ID,
'dt_catalog_category',
array('fields' => 'ids')
);
}
if( !empty($rel_works['related']) ):
?>
<p class="hr hr-narrow gap-small"></p>
<div class="gap"></div>
<div class="full-width w-photo">
<h2><?php _e('Related Items', LANGUAGE_ZONE); ?></h2>
<?php
if( 'same' == $rel_works['related'] ) {
$rel_works['related'] = wp_get_post_terms(
$post->ID,
'dt_catalog_category',
array('fields' => 'ids')
);
}
$dt_tmp_query = new WP_Query( array(
'posts_per_page' => -1,
'post_type' => 'dt_catalog',
'post_status' => 'publish',
'post__not_in' => array($post->ID),
'tax_query' => array( array(
'taxonomy' => 'dt_catalog_category',
'field' => 'id',
'terms' => $rel_works['related'],
'operator' => 'IN'
) )
) );
if( $dt_tmp_query->have_posts() ) {
$thumb_arr = dt_core_get_posts_thumbnails( $dt_tmp_query->posts );
$items = array();
foreach( $dt_tmp_query->posts as $rel_post ) {
$item = array();
$img = dt_get_resized_img(
dt_get_thumb_meta($thumb_arr['thumbs_meta'], 'full', $rel_post->ID),
array('w' => 196, 'h' => 123, 'use_noimage' => true)
);
$item['src'] = $img[0];
$item['size_str'] = $img[2];
$item['post_id'] = $rel_post->ID;
$item['desc'] = apply_filters('get_the_excerpt', $rel_post->post_excerpt);
$item['title'] = apply_filters('the_title', $rel_post->post_title, $rel_post->ID);
$item['alt'] = esc_attr( $item['title'] );
$items[] = $item;
}
$args = array( 'items_arr' => $items, 'id' => '', 'class' => 'list-carousel recent bx', 'ul_class' => 'slider1' );
$args['wrap'] = '<div class="%CLASS% bx">%SLIDER%</div>';
if( ! empty( $rel_works['show_desc'] ) || ! empty( $rel_works['show_title'] ) ) {
$title = '';
if( ! empty( $rel_works['show_title'] ) ) {
$title = '<h3>%TITLE%</h3>';
}
$desc = '';
if( ! empty( $rel_works['show_desc'] ) ) {
$desc = '<p>%DESC%</p>';
}
$args['item_wrap'] = '
<li>
<div class="textwidget">
<div class="textwidget-photo">
<a class="photo" href="%LINK%"><img src="%IMG_SRC%" alt="%ALT%" %IMG_SIZE% /></a>
</div>
<div class="widget-info">
<div class="info">
' . $title . $desc . '
</div>
</div>
</div>
</li>
';
}
dt_get_carousel_slider( $args );
}
?>
</div>
<?php endif; endif; ?>
<?php comments_template(); ?>
<?php
endwhile;
endif;
?>
</div>
<?php dt_widget_area('sidebar', null, 'sidebar_4'); ?>
</div>
<?php get_footer(); ?>
AND THIS IS THE CODE THAT DISPLAYS THE SHORTCODE JUST AS TEXT:
<?php
global $post;
$page_data = dt_storage( 'page_data' );
$page_opts = ! empty( $page_data['page_options'] ) ? $page_data['page_options'] : array();
$add_data = dt_storage( 'add_data' );
$first_class = '';
if( 1 === dt_storage('post_is_first') ) {
$first_class = ' first';
dt_storage( 'post_is_first', -1 );
}
$opts = get_post_meta($post->ID, '_dt_catalog-goods_options', true);
?>
<div class="<?php dt_portfolio_classes( '2_col-list', 'block' ); echo $first_class; ?>">
<?php
$h = 220;
if ( ! empty ( $page_opts['thumb_height'] ) ) {
$h = $page_opts['thumb_height'];
}
dt_get_thumb_img( array(
'class' => 'photo',
'use_noimage' => true,
'href' => get_permalink(),
'thumb_opts' => array( 'w' => 343, 'h' => $h )
),
'<div class="textwidget-photo">
<a %HREF% %CLASS% %TITLE% %CUSTOM%><img %ALT% %SRC% %IMG_CLASS% %SIZE% /></a>
</div>'
);
?>
<div class="<?php dt_portfolio_classes( '2_col-list', 'info' ); ?>">
<a class="<?php dt_portfolio_classes( '2_col-list', 'head' ); ?>" href="<?php the_permalink(); ?>"><?php the_title(); ?></a>
<?php if( !empty($opts['price']) ): ?>
<span class="price"><?php _e('Price: ', LANGUAGE_ZONE); echo esc_html($opts['price']); ?></span>
<?php endif; ?>
<?php
dt_the_content();
dt_details_link();
dt_edit_link();
?>
<div id="specialpriceshortcode">
<?php
$my_textbox_value = mtbxr_val("shopping_shortcode");
echo do_shortcode("$my_textbox_value");
?>
</div>
</div>
</div>
Try using single quotes in the do_shortcode call, like so:
echo do_shortcode('$my_textbox_value');
More likely though is that the shortcode isn't defined on the archive page so you'd need to look at where it is being instantiated to see if that is the issue. Normally when a shortcode just echoes out the content it means that shortcode doesn't exist. You can test easily enough by using the shortcode_exists() function:
<?php if ( shortcode_exists( 'add_to_cart' ) ) { echo "The shortcode exists";} ?>
If that doesn't work then you know the issue is with the shortcode not being registered on your archives page. If it does work then you know it's something with the format of the content being passed to the shortcode.
Add this to your functions.php
// Allow shortcodes on widgets
add_filter('widget_text','do_shortcode');
// Allow shortcodes on pages (not tested, but should work)
add_filter('the_content','do_shortcode');
Typically your shortcode is getting registered in a plugin or your theme's functions.php file. In a plugin it's often something like:
add_action('init', 'register_my_shortcode');
function register_my_shortcode(){
add_shortcode('my_shortcode', 'do_my_shortcode');
}
And then you'd have a function do_my_short_code() that actually outputs the content. With something like that the shortcode is getting registered via the 'init' hook (http://codex.wordpress.org/Plugin_API/Action_Reference) which is called before WP has started figuring out what template to use, what content to output, etc.
But some plugins will register the shortcode in a way that it is only available on pages / posts where it's going to potentially be used. For example, I can think of one plugin where they register the shortcode and enqueue some javascripts in the same function. That function checks to see if you're on a particular page before it executes so that the js files are not included unnecessarily all over the place. Since the shortcode registration takes place in the same function it means the shortcode only exists on those pages.
Anyhow, if the shortcode is showing as existing on your archives page you know that isn't the problem, so check that first and let me know what you find.

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