How 2 Insert Data Into Forum's Database Via A Form

[Come2Daddy]

Well I think of making a template that tells the user that his input has been inserted into the database
so let's say this template has the name test_user_message

then after query insert statement I'd put this statement

PHP Code:

eval('print_output("' . fetch_template('test_user_message') . '");'); 


but what I really would like to concentrate on, right now, is inserting data into the data base table

here is the error message it shows me:

Database error in vBulletin 3.8.4:

Invalid SQL:
INSERT INTO testtable(testcolumn) VALUES (How could it work);

MySQL Error   : You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'could it work)' at line 1
Error Number  : 1064