mysql_num_rows(): supplied argument is not a valid MySQL result resource

Posted by php-b-grader on Stack Overflow See other posts from Stack Overflow or by php-b-grader
Published on 2010-05-28T01:08:07Z Indexed on 2010/05/28 1:11 UTC
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php

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mysql-query

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resultset

I am getting this error when I pass an invalid SQL string... I spent the last hour trying to find the problem assuming - It's not my SQL it must be the db handle... ANyway, I've now figured out that it was bad SQL...

What I want to do is test the result of the mysql_query() for a valid resultset.

I am simply using empty($result)... Is this the most effective test? Is there a more widely accepted method of testing a resultset for a valid result?

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