What's wrong with this?

I'm getting a parse error on this statement. The script originally ran on PHP 4 and it worked fine, but I had to switch it to a server running PHP 3 and now it doesn't work. Any ideas?

$qid = db_query("INSERT INTO clients_categories (categories_id, clients_id) VALUES ('{$frm["categories"][$i]}', '$id')");

Below is the text of the error:
expecting `STRING' or `NUM_STRING' or `'$''

Remove the {}. They aren't necessary here (because of the single quotes) and aren't supported under PHP3.

OK. I removed the {}, but unfortunately I still get the same error. Any other ideas? I appreciate the help, I'm still pretty new at this.

I'm a relative newbie myself (I learn mostly from trial and error, so if this doesn't work; ignore me

$qid = db_query("INSERT INTO clients_categories (categories_id, clients_id) VALUES ('($frm["categories"][$i])', '$id')");


You may also want to consider creating a new variable for $frm["categories"][$i]; so you're only inserting 1 variable instead of 2.

Aren't the double quotes around categories supposed to be escaped like "categories"? Maybe PHP4 was made to recognize and fix this mistake while PHP3 wasn't.

Ooops, didn't see those " in there.

With PHP4 you can use the {} and it will recognize the " inside the {} as part of that expression and NOT the closing " of the statement.

Just remove the " as they aren't necessary or escape them as suggested.

Thanks for all the help. I ended up just putting it in a separate variable and this worked.