query

[PaulaRun]

I'm trying to get my IPN code to work. Can somebody tell me what is wrong with this query??

$sql = "SELECT * FROM std_notify WHERE txn_id = $txn_id";

It says: Could not execute query. Unknown column 'WFR2937TGIF6RECLY' in 'where clause'

It seems like it is taking the value of the column as the column name. Why?

[lowslot]

$sql = "SELECT * FROM std_notify WHERE txn_id = '$txn_id'";

[PaulaRun]

Thanks!