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

Posted on 16th Feb 2014 07:03 pm by admin

This may be simple I just may need another pair of eyes..

When i get records back the below code works just fine, when I get 0 rows back it shows the warning below. As you can see I tried to code for it and you can see that the code works as it echo's my message but I want the warning to go away

Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in show_coupon_list.php on line 224
No Coupons for this Catogory or Business. Please let us know about the Category that displayed no results so we can contact businesses for you!

Code: $cat_coupons = mysql_query("SELECT a.business_name, a.seq_id, a.state, a.city
FROM users a where a.seq_id = '$cat_coupons_seq_id'");

Code: $cat_num=mysql_num_rows($cat_coupons);
if ($cat_num > 0)
{
while ($row = mysql_fetch_array($cat_coupons))
{
$business_name = $row["business_name"];
$business_id = $row["seq_id"];
$state = $row["state"];
$city = $row["city"];
echo"<tr>
<td align = 'left'>&nbsp;&nbsp;<a href=show_coupon.php?business=".urlencode($business_name).">$business_name &nbsp;&nbsp;&nbsp; $city,$state </a></td>
</tr>";
}
}
else
echo"<tr>
<td>No Coupons for this Catogory or Business. Please let us know about the Category that
displayed no results so we can contact businesses for you!
</td>
</tr>";

Your Answer:

Login to answer

Other forums

Values disappear from my array :( HELP!
hey all, I have a lil mysql/php/apache script that queries a database
and pulls put 5 integers.

How to Detect it is public_html or httpdocs?
How to check whether it is cPanel or Plesk?

If it found public_html perform <?php incl

Lining up columns nicely.
Hello everyone, I'm having problems with making columns line up properly. Here is my code:

please help me... my password gets encrypted but not able to get in database
hai guys,
please help me... in the following function my password gets encrypted but no

mysqli_fetch_assoc returns multiple arrays, how to return a single array
Hello, I am using mysqli_fetch_assoc which is returning multiple rows, so it looks like:

Code

Using two $_POST Function / Switch () statements, second does not work.
Hi all. I’m new to php and am having a problem getting $_POST Function / switch () to work. I

tell csv import script to ignore blank rows?
Hi i have the below script but i get an error if a row is blank ie a return in the csv file at the e

eregi to preg
Im converting my regex for php 5.3 and I am stuck on the following

Code: [Select]if((eregi(&q

Conditions of info record - Error
When i created GR (901) and PO create automatic my PBXX is obtain the net price of info record but

Floating Point Precision Loss
I'm writing a program to draw a three-dimensional cube (with a corner cut off) without using any 3D