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

Variables and Include
Code: [Select]<?php

$header = $_COOKIE['mss']['header'];
$body = $_COOKIE['mss']['b

How to schedule the a job?
Hi,
I have prepared a task ( i.e. a procedure is prepare the file and send the same to con

php problem?
I don't think I'm stupid, but maybe I am.

I am working on a sit for a friend I am try to put

what business processes?
Hi,

A general question. What business processes (like OTC - Order to Cach, P2P, R2R etc)

Simple Scraper... Weird Output
Okay, maybe I just need a Blue Monster and some sleep, but....

I'm scraping a ringtone site

PHP submit form script causing blank page
Im trying to submit a form using this script, however nothing shows up on the page, does anyone know

Why do I get this error?
Error:

Parse error: syntax error, unexpected T_ENCAPSED_AND_WHITESPACE, expecting T_STRING or

passthru() help
Hi everyone,
I'm new to the forum and to PHP. I have some pretty good experience writing shell sc

PHP Upload issue
Hi guys,

I have stumble across an interesting issue with my script and is doing my head in.

Weird Problem with curl while sending data
I am facing a weird problem with sending data to a site via curl.

If i send the value by this