PDO get the last ID inserted
That's because that's an SQL function, not PHP. You can use PDO::lastInsertId().
Like:
$stmt = $db->prepare("...");$stmt->execute();$id = $db->lastInsertId();If you want to do it with SQL instead of the PDO API, you would do it like a normal select query:
$stmt = $db->query("SELECT LAST_INSERT_ID()");$lastId = $stmt->fetchColumn();
lastInsertId() only work after the INSERT query.
Correct:
$stmt = $this->conn->prepare("INSERT INTO users(userName,userEmail,userPass) VALUES(?,?,?);");$sonuc = $stmt->execute([$username,$email,$pass]);$LAST_ID = $this->conn->lastInsertId();Incorrect:
$stmt = $this->conn->prepare("SELECT * FROM users");$sonuc = $stmt->execute();$LAST_ID = $this->conn->lastInsertId(); //always return string(1)=0
You can get the id of the last transaction by running lastInsertId() method on the connection object($conn).
Like this $lid = $conn->lastInsertId();
Please check out the docs https://www.php.net/manual/en/language.oop5.basic.php