Extend WooCommerce product search to custom taxonomies and custom fields - php

Question

I am creating advance woocommerce search and I want to add sku and product_tag and product_category in search query. Below I am using Enable custom taxonomies in WooCommerce product search answer code, that enable search for multiple taxonomies:
add_filter( 'posts_search', 'woocommerce_search_product_tag_extended', 999, 2 );
function woocommerce_search_product_tag_extended( $search, $query ) {
global $wpdb, $wp;
$qvars = $wp->query_vars;
if ( is_admin() || empty($search) || ! ( isset($qvars['s'])
&& isset($qvars['post_type']) && ! empty($qvars['s'])
&& $qvars['post_type'] === 'product' ) ) {
return $search;
}
// Here set your custom taxonomies in the array
$taxonomies = array('product_tag', 'product_cat');
$tax_query = array('relation' => 'OR'); // Initializing tax query
// Loop through taxonomies to set the tax query
foreach( $taxonomies as $taxonomy ) {
$tax_query[] = array(
'taxonomy' => $taxonomy,
'field' => 'name',
'terms' => esc_attr($qvars['s']),
);
}
// Get the product Ids
$ids = get_posts( array(
'posts_per_page' => -1,
'post_type' => 'product',
'post_status' => 'publish',
'fields' => 'ids',
'tax_query' => $tax_query,
) );
if ( sizeof( $ids ) > 0 ) {
$search = str_replace( 'AND (((', "AND ((({$wpdb->posts}.ID IN (" . implode( ',', $ids ) . ")) OR (", $search);
}
return $search;
}
I want to add product sku too in search query, how to add it ?

Answer 1

The following will extend Product search to multiple taxonomies (Product Category and Product tag) and multiple custom fields (as SKU here):
add_filter( 'posts_search', 'woocommerce_search_product_mega_extended', 999, 2 );
function woocommerce_search_product_mega_extended( $search, $query ) {
global $wpdb, $wp;
$qvars = $wp->query_vars;
if ( is_admin() || empty($search) || ! ( isset($qvars['s'])
&& isset($qvars['post_type']) && ! empty($qvars['s'])
&& $qvars['post_type'] === 'product' ) ) {
return $search;
}
// SETTINGS:
$taxonomies = array('product_tag', 'product_cat'); // Here set your custom taxonomies in the array
$meta_keys = array('_sku'); // Here set your product meta key(s) in the array
// Initializing tax query
$tax_query = count($taxonomies) > 1 ? array('relation' => 'OR') : array();
// Loop through taxonomies to set the tax query
foreach( $taxonomies as $taxonomy ) {
$tax_query[] = array(
'taxonomy' => $taxonomy,
'field' => 'name',
'terms' => esc_attr($qvars['s']),
);
}
// Get the product Ids from taxonomy(ies)
$tax_query_ids = (array) get_posts( array(
'posts_per_page' => -1,
'post_type' => 'product',
'post_status' => 'publish',
'fields' => 'ids',
'tax_query' => $tax_query,
) );
// Initializing meta query
$meta_query = count($meta_keys) > 1 ? array('relation' => 'OR') : array();
// Loop through taxonomies to set the tax query
foreach( $taxonomies as $taxonomy ) {
$meta_query[] = array(
'key' => '_sku',
'value' => esc_attr($qvars['s']),
);
}
// Get the product Ids from custom field(s)
$meta_query_ids = (array) get_posts( array(
'posts_per_page' => -1,
'post_type' => 'product',
'post_status' => 'publish',
'fields' => 'ids',
'meta_query' => $meta_query,
) );
$product_ids = array_unique( array_merge( $tax_query_ids, $meta_query_ids ) ); // Merge Ids in one array with unique Ids
if ( sizeof( $product_ids ) > 0 ) {
$search = str_replace( 'AND (((', "AND ((({$wpdb->posts}.ID IN (" . implode( ',', $product_ids ) . ")) OR (", $search);
}
return $search;
}
Code goes in functions.php file of your active child theme (or active theme). Tested and works.
Related: Enable custom taxonomies in WooCommerce product search