Question

This is my current table design

I have a many to many relationship.

For example I created / inserted an entry to the musicians table how do I actually pass its primary key (id) that is generated from it and immediately insert it to field musician_id from musician_x_instrument table?

Answer 1

Assuming you use mysqli, you get if using the insert_id function:

$query = "INSERT INTO myCity VALUES (NULL, 'Stuttgart', 'DEU', 'Stuttgart', 617000)";
$mysqli->query($query);

printf ("New Record has id %d.\n", $mysqli->insert_id);

You then insert this ID in the join table as you would insert any other data into any other table.