<?php
require_once __DIR__ . '/config.php';
require_once __DIR__ . '/includes/db.php';
$db = DB();

$admitCard = $db->fetchOne("SELECT * FROM admit_cards WHERE student_id = 32 LIMIT 1");
if ($admitCard) {
    $cData = json_decode($admitCard['custom_data'], true);
    $cData['student']['father_name'] = 'tttt';
    $json = json_encode($cData, JSON_UNESCAPED_UNICODE);
    
    $db->query("UPDATE admit_cards SET custom_data=? WHERE student_id=32", [$json]);
    echo "UPDATED SUCCESS";
} else {
    echo "NOT FOUND";
}