<?php
try {
    $pdo = new PDO('mysql:host=baroncs.co.kr;port=3306;dbname=baronhomep;charset=utf8mb4', 'baronhomep', 'baron3840!!', [PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION]);
    $rows = $pdo->query('SELECT group_code, code, code_name, is_active FROM edu_codes ORDER BY group_code, code')->fetchAll(PDO::FETCH_ASSOC);
    echo count($rows) . ' rows' . PHP_EOL;
    foreach ($rows as $r) {
        echo implode(' | ', $r) . PHP_EOL;
    }
    echo PHP_EOL . '--- SHOW TABLES ---' . PHP_EOL;
    $tables = $pdo->query('SHOW TABLES LIKE "edu_%"')->fetchAll(PDO::FETCH_COLUMN);
    foreach ($tables as $t) echo $t . PHP_EOL;
} catch (Exception $e) {
    echo 'ERROR: ' . $e->getMessage() . PHP_EOL;
}