ioannes wrote:
My first attempt was to use $result=array_merge($result1,$result2) - doesn't work. 'not a valid resource'

I have two databases with different connections, so MySQL UNION query would not work.

How do I merge the result set of the queries in that case?

You're going to have to merge the results within PHP.

"not a valid resource" is an error you get when you try to read from a result set and what you pass it isn't a resource for a result set.

I think you're doing something along the lines of:

$result1 = query_database_one($somequery);
$result2 = query_database_two($someotherquery);
$result = array_merge($result1, $result2);
while (mysql_fetch_row($result)) {
        // foo


Which won't work on any level. mysql_fetch_row takes a resource, it's a pointer to give the database to retrieve the row. When you do your query to the database, the database does the query but doesn't return the full result - instead it just returns a resource to the result, so you can get it as you need it.

I suggest you start from that information and work forward.

- Martin Norland, Sys Admin / Database / Web Developer, International Outreach x3257
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