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

Php - mysql store data and use it later?
Hi, i' making a login page at the moment, however my username + password is stored many different pl

how to insert value
I am having file bookissueadd.php..... in which i am having tag

<td height="21&q

help removing unwanted graphic
How do I remove the small elongated rectangular shape between the "Latest post" and "

Comma seperated implode & modifying returned string.
I have a PHP post form that posts up to 4 variables. I need whatever variables are passed to be comb

Sending CC Info by email
I am a little bit less knowledgable in the security area as most developers and I know I have a lot

SAP Business Suite
Hi all:

Within the SAP Business Suite solution I would like to ask you the main differenc

post to self
Trying to get my form to submit to itself. However I am also trying to use an image for my submit bu

Problem related to Creation of PDF File?
Hi All,
I am facing a problem related to creation pdf file. when I am creating a pdf file of do

Using cURL to PUT
Can somebody help with the correct php code to make a cURL PUT request. Here is a sample of code bel

Is it possible to put an entire 500-page book in a database with PHP?
I am working on an intranet and I was wondering if its possible to code php with mysql to enter a fu