首先验证产品属性(meta_key) 通过运行此查询

注意：根据wordpress数据库更改表前缀mine是默认wp_

SELECT * FROM wp_postmeta WHERE meta_key LIKE \'%code%\'; /* get attribute name example (_sku, _stock, _stock_status, height, width )*/

function Add_custom_search( $query ) 
{

if( ! is_admin() && $query->is_main_query() ) 
{
    if ( $query->is_search() ) 
    { 
        $meta_query = $query->get( \'meta_query\' );
        $meta_query[] = array(
            \'key\'       => \'code\', /* Product Attribute Meta key Here example (_sku, _stock, _stock_status, height, width ) */
            \'value\'     => $query->query[\'s\'],
            \'compare\'   => \'LIKE\'  
        );
        $query->set( \'meta_query\', $meta_query );
    }
 }
}
add_action( \'woocommerce_product_query\' , \'Add_custom_search\' );