How can i open an access database with php for writing?

Hi, i have a source code about openning a Microsoft Access Database by php. but i think this source is only about openning as read.

How can i open it as write by php. and how can i make a command to delete one of the recods. you can see my sample:

 $connect = odbc_connect($users_odbc,$user_db,$u_odbc_pass);
 $q1 = "select * from TAC_USR where TAC_ID='$username' and TAC_Attr = '[Global]Passwd' and tac_val = '$password'" ;

Code (markup):

 

try an insert statement to see if it's only for read or for read/write