Question

Possible Duplicate:
mysql_fetch_array() expects parameter 1 to be resource, boolean given in select

<?php 
$con=mysql_connect('localhost','root','');
mysql_selectDb('cms',$con);
$con2=mysql_connect('localhost','root','');
mysql_selectDb('cms2',$con2);
$memberId="Member0001";
$select2=mysql_query("select * from member_register where memberID='$memberId'",$con);
$row2=mysql_fetch_array($select2);
?>

i got a code like above, select 2 database from 1 server, sure the code is right, but it appear

Warning: mysql_fetch_array() expects parameter 1 to be resource, boolean given in xxx on line xxx

Answer 1

There is no need to maintain two connections to the same DB server with the same credentials. You can trivally use

SELECT db1.table.member_register, ...

SELECT db2.othertable.somefield, ...

using the same single connection. Two connections would only really be needed if you have to connect using DIFFERENT credentials.

In your case, since you’re getting a ‘boolean received’, your query failed, and you simply assumed it succeeded (NOT a good idea). Try:

$select2=mysql_query("...",$con) or die(mysql_error());
                                ^^^^^^^^^^^^^^^^^^^^^^

to find out WHY the query failed.