90 lines
2.5 KiB
PHP
90 lines
2.5 KiB
PHP
<?php
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require_once dirname(__DIR__, 2) . '/vendor/autoload.php';
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use Dotenv\Dotenv;
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class DBHandlerSelect
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{
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private static $instance = null;
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private $pdo;
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private function __construct()
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{
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$dotenv = Dotenv::createImmutable(dirname(__DIR__, 2));
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$dotenv->load();
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$host = $_ENV['DB_HOST'];
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$db = $_ENV['DB_DATABASE'];
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$user = $_ENV['DB_USERNAME'];
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$pass = $_ENV['DB_PASSWORD'];
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$charset = 'utf8mb4';
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$dsn = "mysql:host=$host;dbname=$db;charset=$charset";
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$options = [
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PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
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PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
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PDO::ATTR_EMULATE_PREPARES => false,
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];
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try {
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$this->pdo = new PDO($dsn, $user, $pass, $options);
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} catch (PDOException $e) {
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die("Database connection failed: " . $e->getMessage());
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}
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}
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public static function getInstance()
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{
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if (self::$instance === null) {
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self::$instance = new DBHandlerSelect();
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}
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return self::$instance;
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}
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public function getConnection()
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{
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return $this->pdo;
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}
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// Ritorna tutte le righe di una SELECT parametrizzata
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public function select($sql, $params = [])
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{
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$stmt = $this->pdo->prepare($sql);
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$stmt->execute($params);
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return $stmt->fetchAll();
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}
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// Ritorna una sola riga (o null se non trova niente)
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public function selectOne($sql, $params = [])
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{
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$stmt = $this->pdo->prepare($sql);
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$stmt->execute($params);
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$row = $stmt->fetch();
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return $row === false ? null : $row;
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}
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// Conta le righe di una query (comodo per le card)
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public function count($sql, $params = [])
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{
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$stmt = $this->pdo->prepare($sql);
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$stmt->execute($params);
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return $stmt->rowCount();
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}
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// Inserisce una riga e ritorna l'id appena creato.
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// $data è un array associativo colonna => valore.
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public function insert($table, $data)
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{
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$cols = array_keys($data);
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$place = array_fill(0, count($cols), '?');
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// i backtick proteggono nomi di tabella/colonna con trattini (es. `trf-details`)
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$colList = '`' . implode('`, `', $cols) . '`';
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$sql = "INSERT INTO `$table` ($colList) VALUES (" . implode(', ', $place) . ")";
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$stmt = $this->pdo->prepare($sql);
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$stmt->execute(array_values($data));
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return $this->pdo->lastInsertId();
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}
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}
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