Question

Today I changed mysql to PDO. And now I have this little problem.
So when I used mysql, and wanted to know the id of the row I just inserted I just had to do this:

$id = $obj_db_write->insert("reservations",$arr_kolommen,$arr_waardes);

When I printed the $id I got: (for example:) 5462

When I use the same line now, I get 1 as Id.

Problem:
When the line is inserted, other columns are using that ID for adding fields in other tables.
So now I get this error:

Warning: PDO::query() [pdo.query]: SQLSTATE[23000]:
Integrity constraint violation: 1062 Duplicate entry '1-double' for key 'RSVR_ID'
in /data/local/www/wereldreizen/html/phpclasses/class_db.php on line 229

What’s quite expected because the RSVR_ID is 1, and 1 is already inserted.

Does someone know where I’m wrong?
Thanks in advance!

Answer 1

With PDO, you don’t get the newly inserted ID as result from a query. Use

PDO::lastInsertId

instead. In your case, that could e.g. look like that:

 $affectedRows = $obj_db_write->exec(your-insert-statement);
 $lastInsertedID = $obj_db_write->lastInsertId();

Check out http://www.php.net/manual/de/book.pdo.php for the full PDO API.