Question

I have 2 tables. In one table I add events, ID are auto-increment. The second table contains personal events.

So if I create event, it adds to both tables.

Here down below is a example of my code. So first of all I add a new event to general table. Then I want to add the same event to schedule table, but I need to get the ID of just added event. So I execute that second query.

Is there any optimized way how to do this or at least get the ID of just added event without extra query?

mysql_query("INSERT INTO events (title, description, user) VALUES ('$title', '$description', '".$user['id']."')");

$id = mysql_fetch_array(mysql_query("SELECT id FROM events WHERE user='".$user['id']."' ORDER BY date_added DESC LIMIT 1"));

mysql_query("INSERT INTO schedule (uid, event) VALUES ('".$user['id']."', '".$id['id']."')") or die(mysql_error());

Answer 1

mysql_insert_id() is what you are after, I think…

You could also use the MySQL native LAST_INSERT_ID() in your second INSERT query:

mysql_query("INSERT INTO schedule (uid, event) VALUES ('".$user['id']."', LAST_INSERT_ID())") or die(mysql_error()); 

…and skip retrieving the ID in PHP altogether.