[英]Return Last Insert ID with PDO
我有這個類並想擴展以返回最后插入的行的 ID,但我不斷收到此錯誤:
致命錯誤:在第 49 行調用未定義的方法 PDOStatement::lastInsertId()
我的代碼:
class DB {
public static $instance = null;
private $_pdo = null,
$_query = null,
$_error = false,
$_results = null,
$_count = 0,
$_lastID = 0;
private function __construct() {
try {
$this->_pdo = new PDO('mysql:host=' . Config::get('mysql/host'). ';
dbname=' . Config::get('mysql/db') . ';
charset=utf8',
Config::get('mysql/username'),
Config::get('mysql/password')
);
} catch(PDOExeption $e) {
die($e->getMessage());
}
}
public static function getInstance() {
if(!isset(self::$instance)) {
self::$instance = new DB();
}
return self::$instance;
}
public function query($sql, $params = array()) {
$this->_error = false;
if($this->_query = $this->_pdo->prepare($sql)) {
$x = 1;
if(count($params)) {
foreach($params as $param) {
$this->_query->bindValue($x, $param);
$x++;
}
}
if($this->_query->execute()) {
$this->_results = $this->_query->fetchAll(PDO::FETCH_OBJ);
$this->_count = $this->_query->rowCount();
$this->_lastID = $this->_query->lastInsertId(); // <- ERRO
} else {
$this->_error = true;
}
}
return $this;
}
根據PHP 文檔,lastInsertId 是 pdo 對象的方法,而不是 stmt 對象(您通過 $this->_query 引用)。 試試這個:
$this->_lastID = $this->_pdo->lastInsertId();
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