On Wednesday 22 May 2002 09:27, Todd Williamsen wrote:
> I get an invalid argument when trying to create this output of pages to
> limit to 20 records per pages.  I removed the line and it stopped the
> error, but the next and previous buttons will go on and on even if there is
> no more records so I am thinking it is my mysql_num_rows() function
> I have gotten this script from here:
> http://www.phpbuilder.com/columns/rod20000221.php3
> If you know of a better one or can help me out on this one, that is much
> appreciated
> Actual error is:
> not a valid mySQL result resource

General tips:

1) Liberal use of mysql_error() at strategic points in your code will help in 
identifying where the problem lies. 

2a) Printing the query (in your case $sql) that you're giving mysql allows you 
to spot any obvious errors.

2b) If you don't spot any obvious errors then copy and paste the contents of 
$sql into the mysql command-line and execute it there.

> <?php
>    $numresults = mysql_query("SELECT * FROM booklist");
>   $numrows = mysql_num_rows($numresults);
>              < ---------------------------------------- FAILS HERE
> // next determine if offset has been passed to script, if not use 0

If that is the start of your code then the obvious mistake is that there is no 
code to connect to mysql and initialise the connection etc.

Jason Wong -> Gremlins Associates -> www.gremlins.com.hk
Open Source Software Systems Integrators
* Web Design & Hosting * Internet & Intranet Applications Development *

A journey of a thousand miles must begin with a single step.
                -- Lao Tsu

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