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

help with email script...
hey

I need help with my mail script

when the form on http://www.mcgdesignstudio.com/c

Big Problem!! Please help
Hi Guys,

Im making a website for a friend have encountered a really annoying problem. When ev

quotes changing
hi all

in my content

opening quotes " changes to “

close qu

Help with translating C code into assembler code
Hi im doing a project that moves a robot around a maze avoiding walls and need some help with conver

Database 'Validation'
Hi everyone,
I'm trying to validate the password entered by the user with the password in the dat

Product categories for registration
Dear all,

We are going live with the Supplier registered next week. At standard, the 'sel

unexpected T_ENCAPSED_AND_WHITESPACE, expecting T_STRING or T_VARIABLE or T_NUM_
Can anyone view my code and tell me why im getting the error:
Parse error: syntax error, unexpect

help with multi-update
Now sure how to ask this really....
10g database if that matters.

I have a customer

How to convert this array to string
I am having problems converting this array to a string
using print_r($val[1]); I get:
Code: [

Problem with passing variables
I'm not really a php programmer so I'm really struggling with this issue.

I have a banner s