How to implode 3rd value in array

[t_machine]

Hi, I would appreciate if anyone could help with this.
I am using the following array of columns in my database query. I am using the sprintf function.

This is my array of columns
$mytbls= array('id', 'user_id', 'groupid', 'expire');

I would like to use only the groupid from that array in something like the following

$sql = sprintf("SELECT %s FROM TABLE_NAME",
                  implode(', ', $mytbls)
                  );
If I keep it as the above, it will select all my columns but I only need the "groupid".

Thanks :)

[wildteen88]

Don't implode the array. Just use $mytbls[2] instead.

[t_machine]

Thank you very much :) It works great now.