Can I convert a PHP variable to an array for SQL db?

Hello,

I have a variable named ‘link’ that’s being passed through GET (URL from previous page) that I need to insert into my SQL db. Something like this:

$ID_workshop = $_GET['link'];

$form_vars = array('ID_num','workshop','comment','ID_workshop');

How do I get the value of $ID_workshop into the field ‘ID_workshop’ in the db? I’ve tried every combination of single and double quotes that I can think of.

$form_vars is being used to insert into the db. That’s why I can’t use the $ID_workshop directly - I need whatever value it’s holding so I can insert ‘ID_workshop’.

Or is there another way to to do this?

Thanks