아래 내용처럼 ID 값 수정후 입력했는데 사이트 전체가 먹통이 되네요.

잘못된 부분이 있을까요?

add_filter('woocommerce_product_tabs', 'kboard_new_product_tab_1');
function kboard_new_product_tab_1($tabs){
	
	$tabs['kboard_new_product_tab_1']['title'] = 'Q&A';
	$tabs['kboard_new_product_tab_1']['priority'] = 91;
	$tabs['kboard_new_product_tab_1']['callback'] = 'kboard_new_product_tab_content_1';
	
	return $tabs;
}

function kboard_new_product_tab_content_1(){
	global $product;
	
	echo '<h2>Q&A</h2>';
	
	$board_id = 2;
	$iframe_id = uniqid();
	$product_id = $product->get_id();
	
	$url = new KBUrl();
	$_SESSION['kboard_board_id'] = $board_id;
	
	echo '<iframe id="kboard-iframe-' . $iframe_id . '" class="kboard-iframe kboard-iframe-' . $board_id . '" src="' . $url->set('kboard_id', $board_id)->set('category1', $product_id)->set('iframe_id', $iframe_id)->toString() . '" style="width:100%" scrolling="no" frameborder="0"></iframe>';
}