警告：mysql_num_rows（）：提供的参数不是有效的MySQL结果资源nationalbuilder webhooks API

Question

We are creating an app for our nationbuilder account using the webhooks API, I'm using a code found here :

https://gist.github.com/amwelles/5165395#file-webhooks-php

to connected and add tables to our database and I keep getting this error :

Warning: mysql_num_rows() : supplied argument is not a valid MySQL result resource in /home/www/ran-methods.org/webhooks.php on line 41

Below is my code. SUper big thanks in advance.

<?php 

// get the request
$data = $_REQUEST['payload'];
// sanitize the data
$unescaped_data = stripslashes($data);
 // set up our object
$person = json_decode($unescaped_data);

// assign variables
$id = $person->signup->nationbuilder_id; // used as a unique identifier
$first_name = $person->signup->first_name;
$last_name = $person->signup->last_name;
$mobile_phone = $person->signup->mobile_number;
$work_phone = $person->signup->work_phone_number;
$other_phone = $person->signup->phone_number;
$email_1 = $person->signup->email1;
$email_2 = $person->signup->email2;
$email_3 = $person->signup->email3;

// connect to our DB
$connect = mysql_connect("localhost","username redacted","password redacted");
mysql_select_db("emmtal_targets", $connect);

// let's create this table if it doesn't exist
$sqltable = "CREATE TABLE IF NOT EXISTS webhook_backup
(
    `first_name` varchar(80),
    `last_name` varchar(80),
    `nb_id` int,
    `mobile_phone` varchar(20),
    `work_phone` varchar(20),
    `other_phone` varchar(20),
    `email_1` varchar(255),
    `email_2` varchar(255),
    `email_3` varchar(255)
)";

// does this user exist in the DB already?
$query = "SELECT `nb_id` FROM `webhook_backup` WHERE `nb_id` = '". $id ."'";
$num_rows = mysql_num_rows($query);

// update if this user already exists
if ($num_rows > 0) {
    $update = "UPDATE `webhook_backup` SET
        `first_name` = '". $first_name ."'
        `last_name` = '". $last_name ."'
        `mobile_phone` = '". $mobile_phone. "'
        `work_phone` = '". $work_phone. "'
        `other_phone` = '". $other_phone. "'
        `email_1` = '". $email_1 ."'
        `email_2` = '". $email_2 ."'
        `email_3` = '". $email_3 ."'
        WHERE `nb_id` = '". $id ."'
        LIMIT 1";
    mysql_query($update, $connect);
}

// add a new row if this user does not yet exist
if ($num_rows == 0) {
    $insert = "INSERT INTO `webhook_backup`
        (`first_name`, `last_name`, `mobile_phone`, `work_phone`, `other_phone`,
        `email_1`, `email_2`, `email_3`, `nb_id`)
        VALUES ('". $first_name ."','". $last_name ."','". $mobile_phone ."','". $work_phone ."',
        '". $other_phone ."','". $email_1 ."','". $email_2 ."','". $email_3 ."','". $id ."')";
    mysql_query($insert, $connect);
}
?>

Answer 1

You need to run the query...you're trying to get the number of rows of a string.

 $query = mysql_query("SELECT `nb_id` FROM `webhook_backup` WHERE `nb_id` = '". $id ."'");
 $num_rows = mysql_num_rows($query);

However, don't use mysql_* functions, they are deprecated. Use mysqli_* instead.