Re:Strange DB Error

What you propose makes sense of course, but no matter what I do, where I send the errors, even to the system log, the mysql_fetch_array () error is the only one that shows up. It would appear that either the query is failing is some way that PHP isn't recognizing, or the fetch isn't working properly. It could also be that for whatever reason, the query isn't finding all of the records that meet the criteria. I've tried doing and unconditional SELECT from the database but that had no effect on this error. I still got it. This is not the only place I look at this database, but it is the only place I get this error. Nick jeffrey_n_Dyke@Keane.com wrote:

Error trapping is not really relevant here as the server is properly

configured so the errors are going to show up in either event. In fact, using the die() >function on my server just makes thing worse. --- it'll definitely make it worse, but hopefully only to find the problem and make it better. you should be able to find the query on which this is not

a     valid resource run that agains't mysql and find out why its failing,

if you can't see that from $qry being in die(). but yes, a bad idea in

production.       send the output to a file on error and see what your

getting.the error that you want is from mysql_query, the error that you're showing is from mysql_fetch_array(), so if the server is configured to show them elsewhere then the answer should be right before the error below hth jeff In any case, the var_dump was a good idea as I was able to find out that what is happening is when this loops up after the first run through the array is blank. It doesn't reinitialize the array with the new values. As far as the $cat, or any of the other variables go, they're always the same when returning to he index. Whether I initialize them from the query string, or in the index itself as in the case when it is loaded without any parameters. The question is, why wouldn't the array be redefined on the second loop? Hell if I know. Nick jeffrey_n_Dyke@Keane.com wrote:

           When returning to the main page of my script sometimes I'll get
           the
           following error:

           Warning: mysql_fetch_array(): 8 is not a valid MySQL result
           resource in
           /home/nick/http/search/includes/main.inc on line 13

           This happens only AFTER the first element in the resource has
           been
           processed. Here's the code that is causing the problem:

     First, i'd place an... or die (mysql_error()) after your mysql call.
     so
     you can see what mysql is complaining about.  basically your sql is
     failing.  I also like to split the first two items, when debegging,
     to see
     what the actual query was.  i.e.
     <psedocode>
     $qry = "SELECT * FROM categories WHERE length(cat)='2'";
     $s = mysql_query($qry) or die (mysql_error() . "\n"<br>" . $qry .
     "\n<br>");
     <psedocode>

     The only time i saw the error on your page the 'cat' GET variable was
     defined as 0.  Is this really a static query like below, or is it
     based on
     what is passed to the page in the query string?  The URL when it
     died...
     http://www.icesource.com/index.php?depth=0&cat=0&index=main.inc,
     which to
     me looks like a bad querystring, but may indeed be valid values.

     If that doesn't lend itself to any useful information, try
     var_dump($t); in
     your while loop, to see what has been processed and what is failing.

     HTH
     Jeff

           $s = mysql_query("SELECT * FROM categories WHERE
           length(cat)='2'");
           while($t = mysql_fetch_array($s)){>    $cat = $t["cat"];
              $name = $t["name"];
              if($tstruc == $dirwidth){>        echo "</tr><tr>";
                  $tstruc = 0;
              }
              echo "<td align=\"left\" valign=\"top\"><font
           face=\"verdana,sans
           serif,helvetica\" size=\"3\"><b><a
           href=\"index.php?index=directory.inc&cat=$cat&name=$name&depth=0\">$name</a></b></font>";

              $subcat = mysql_unbuffered_query("SELECT * FROM categories
           WHERE
           length(cat)='4' && substring(cat,1,2)='$cat' ORDER BY cat");
              while($ct = mysql_fetch_array($subcat)){>        $scats

     = $ct["name"];

                  $dcats = $dcats . $scats . ", " ;
              }
              $dcats = trim(substr($dcats, 0, 28)) . trim("...");
              if($dcats != "..."){>        echo "<br><font face
           = \"tahoma,sans

     serif,helvetica\"

           size=\"1\">" . $dcats . "</font>";
              }
              $dcats = "";
              echo "</td>";
              ++$tstruc;
           }

           You can go to the site http://www.icesource.com to see this
           script in
           action. This is an intermittent problem so you may not see it
           at the
           site, but it does happen there sometimes. If you click on one
           of the
           categories on the list there, and to two or three deep, then
           hit the
           Home link at the top left of the listings there's a pretty good
           chance
           you'll see the problem. I've been trying to figure this out for
           a long
           time, and nothing seems to work. Any ideas out there would be
           greatly
           appreciated.

           Nick