Add checkbox to save page

Hey guys,

I’m building my own WordPress theme and have a question.
I want to save the value of a checkbox. Currently I have only text boxes.

function manager_admin_menu() {

if(isset($_GET[‘page’]) && $_GET[‘page’] == ‘test’) {

if(isset($_POST[‘action’]) && $_POST[‘action’] == ‘save’) {

$pics= array();

foreach($_POST[‘src’] as $k => $v) {
$pics[] = array(
‘src’ => $v,
‘link’ => $_POST[‘link’][$k],
‘caption’ => $_POST[‘caption’][$k]
);
}

update_option(‘pics’, $pics);