how do i trace this php sql error?

[directory_man]

i found this error:
Query failed : Unknown column 'admin' in 'where clause'

well in fact, i successfully pass its id which is 'admin' to other page that will be using its value to a certain query.

here's my query:

$strID=$_GET['ID'];"SELECT userid,password,username,email,active FROM user WHERE userid=".$strID;

[cazzypooh]

you need strID quoted:"SELECT userid,password,username,email... FROM user WHERE userid='".$strID."'";
or if