PHP Decode

<?  /* Add sku to product search */ 
 
function search_by_sku( $search, $query_vars ) { 
global $wpdb; 
if(isset($query_vars->query['s']) && !empty($query_vars->query['s'])){ 
        $args = array('posts_per_page'  => -1,'post_type'=>'product','meta_query' => array(                array(                    'key' => '_sku',                    'value' => $query_vars->query['s'],                    'compare' => 'LIKE'                )            )        );        $posts = get_posts($args);        if(empty($posts)) return $search;        $get_post_ids = array();        foreach($posts as $post){            $get_post_ids[] = $post->ID;        }        if(sizeof( $get_post_ids ) > 0 ) {                $search = str_replace( 'AND (((', "AND ((({$wpdb->posts}.ID IN (" . implode( ',', $get_post_ids ) . ")) OR (", $search);        }    }    return $search;    } 
 
add_filter( 'posts_search', 'search_by_sku', 999, 2  ?>