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

I've got the following error:
Warning: mysql_num_rows( ): supplied argument is not a valid MySQL result resource in /home/wbdfdart/public_html/wbdfforum/verwijder.php on line 13

verwijder.php

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<?php
include "connect.ph p";

if (isset ($cat) AND isset ($topic) AND isset ($message)) {
$query = "SELECT user FROM reply WHERE id='$message'";
$exec = mysql_query($qu ery);
$result = mysql_fetch_arr ay($exec);
$owner = $result["user"];

$moderator_chec k_query = "SELECT * FROM moderator WHERE category=$cat AND user=$myid";
$moderator_chec k_exec = mysql_query($mo derator_check_q uery);
$moderator_resu lt = mysql_num_rows( $moderator_chec k_exec);

if ($moderator_res ult == 1 OR $owner == $myid) {
$moderator = 1;
}

else {
$moderator = 0;
}

if ($moderator == 1) {
$replydelete_qu ery="DELETE FROM reply WHERE id ='$id'";
mysql_query($re plydelete_query ) or die(mysql_error ());
$topicmineen_qu ery="UPDATE topic SET replies='replie s -1' WHERE id='$topic'";
mysql_query($to picmineen_query ) or die(mysql_error ());
echo "<script>locati on.href='index. php?cat=".$cat. "&topic=".$topi c."&page=".$pag e."'</script>";

}

else {
echo "<script>locati on.href='index. php?cat=".$cat. "&topic=".$topi c."&page=".$pag e."'</script>";
}}
?>



What i did wrong?
Jul 17 '05 #1
5 21539
Try this in line 10

$moderator_chec k_query = "SELECT * FROM moderator WHERE category='$cat' AND user='$myid'";

Jul 17 '05 #2
[ Followup-To comp.lang.php ]

Arjan wrote:
Content-Type: text/html;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>

[big snip]

This does not look like php to me.
check the return value from mysql_query().

<?php
$sql = "select col1, col2 from table where col3='XYZ'";
$result = mysql_query($sq l) or die(mysql_error ());
// _______________ _________^^^^^^ ^^^^^^^^^^^^^^^ ^_
// ...
?>
--
--= my mail box only accepts =--
--= Content-Type: text/plain =--
--= Size below 10001 bytes =--
Jul 17 '05 #3
What i did wrong?

Many things, probably.

http://nopaste.php.cd/5795

Let me know if it worked - untested.

A.

--
My homepage
http://antoniobonanno.debris.it/

My portfolios
http://www.debris.it/whois.php?i=6
http://www.usefilm.com/photographer/19053.html
http://www.photosig.com/go/users/view?id=99395
Jul 17 '05 #4
Ok

$moderator_chec k_query = "SELECT * FROM moderator WHERE category=" . $cat .
" AND user=" . $myid;

should be

$moderator_chec k_query = "SELECT * FROM moderator WHERE category=" . $cat .
" AND user='" . $myid."'";

or more simply
$moderator_chec k_query = "SELECT * FROM moderator WHERE category=' $cat' AND
user=' $myid' ";

Kman

"Plasson" <an************ *************** *@email.it> wrote in message
news:aR******** *************@n ews2.tin.it...
What i did wrong?

Many things, probably.

http://nopaste.php.cd/5795

Let me know if it worked - untested.

A.

--
My homepage
http://antoniobonanno.debris.it/

My portfolios
http://www.debris.it/whois.php?i=6
http://www.usefilm.com/photographer/19053.html
http://www.photosig.com/go/users/view?id=99395

Jul 17 '05 #5
Thanx!

"Kman" <km*********@ya hoo.com> schreef in bericht
news:U0******** **********@news 20.bellglobal.c om...
Ok

$moderator_chec k_query = "SELECT * FROM moderator WHERE category=" . $cat .. " AND user=" . $myid;

should be

$moderator_chec k_query = "SELECT * FROM moderator WHERE category=" . $cat .. " AND user='" . $myid."'";

or more simply
$moderator_chec k_query = "SELECT * FROM moderator WHERE category=' $cat' AND user=' $myid' ";

Kman

"Plasson" <an************ *************** *@email.it> wrote in message
news:aR******** *************@n ews2.tin.it...
What i did wrong?

Many things, probably.

http://nopaste.php.cd/5795

Let me know if it worked - untested.

A.

--
My homepage
http://antoniobonanno.debris.it/

My portfolios
http://www.debris.it/whois.php?i=6
http://www.usefilm.com/photographer/19053.html
http://www.photosig.com/go/users/view?id=99395


Jul 17 '05 #6

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