Back To PHP PDO MySql

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<?php //php program to demonstrate last insert id to retrieve last added key of the record $hostname = 'localhost'; $username = 'root'; $password = ''; try { $dbh = new PDO("mysql:host=$hostname;dbname=students", $username, $password); print('Connected to database<br />'); $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); $dbh->exec("INSERT INTO student(name,class,marks) VALUES ('abcdef',11,89)"); print($dbh->lastInsertId()); $dbh = null; } catch(PDOException $e) { print($e->getMessage()); } ?>