filter_input_array and checkbox yes or no

How to add checkbox value into database. Earlier without filtering input i used

if(!empty($_POST['submit'])){

    $widgetEnabled = isset($_POST['widgetEnabled']) ? 'yes' : 'no';
    $widgetWidth = $_POST['widgetWidth'];
    $widgetHeight = $_POST['widgetHeight'];

}

But how do do it now?

<?php

$errors = array();
$success = NULL;
$error = NULL;
/* Form is not submitted display mysql data */
$input = array(
    'widgetEnabled' => $configs['widgetEnabled'],
    'widgetWidth'   => $configs['widgetWidth'],
    'widgetHeight'  => $configs['widgetHeight']
);
/* /Form is not submitted display mysql data */

//Form is submitted, run code //
if(filter_has_var(INPUT_POST, 'submit')){

    $defs = array(
        'widgetEnabled' => FILTER_SANITIZE_STRING,
        'widgetWidth'   => array('filter' => FILTER_SANITIZE_NUMBER_FLOAT,
                                 'flags'  => FILTER_FLAG_ALLOW_THOUSAND),
        'widgetHeight'  => array('filter' => FILTER_SANITIZE_NUMBER_FLOAT,
                                 'flags'  => FILTER_FLAG_ALLOW_THOUSAND)
    );  

    $input = filter_input_array(INPUT_POST, $defs); 

    require_once 'includes/antiCsrf/index.php';
    $csrf = new antiCsrf();

    if($csrf->verifyCsrfToken() === FALSE){
        $errors[] = $lang['error']['a_0004'];
    }
    if(empty($input['widgetWidth'])){
        $errors[] = $lang['error']['a_0005'];
    }
    if(empty($input['widgetHeight'])){
        $errors[] = $lang['error']['a_0006'];
    }

}
//Form is submitted and no errors detected, update db //
if(filter_has_var(INPUT_POST, 'submit') and empty($errors)){

    foreach($input as $key => $value){

        $query = 'UPDATE configs SET value = :value WHERE config = :key';
        $update = $db->prepare($query);
        $update->bindParam(':value', $value, PDO::PARAM_STR);
        $update->bindParam(':key', $key, PDO::PARAM_STR);
        $message = $update->execute();

    }

    if($message)
        $success = $lang['success']['a_0002'];
    else
        $error = $lang['error']['a_0003'];

}

require_once 'includes/antiCsrf/index.php';
$csrf = new antiCsrf();

$smarty->assign('success', $success);
$smarty->assign('error', $error);
$smarty->assign('errors', $errors);
$smarty->assign('csrfKey', $csrf->csrfKey());
$smarty->assign('csrfToken', $csrf->csrfToken());
$smarty->assign('input', $input);
$smarty->display('widgetConfigs.tpl');

$db = NULL;
$csrf = NULL;

?>

---------------------------------------------------TEMPLATE -----------------------------------------------------------

<form method="post" class="form-horizontal">
<input type="hidden" name="csrfKey" value="{$csrfKey}">
<input type="hidden" name="csrfToken" value="{$csrfToken}">

Enabled <input type="checkbox" name="widgetEnabled" value="{$input.widgetEnabled}"{setChecked($input.widgetEnabled, 'yes')}>Yes
Width <input type="text" name="widgetWidth" value="{$input.widgetWidth}">px
Height <input type="text" name="widgetHeight" value="{$input.widgetHeight}">px

<form>