Question

Why do I get a “mysql_query(): supplied argument is not a valid” for the first…

$r = mysql_query($q, $connection);

In the following code…

$bId    = trim($_POST['bId']);
$title  = trim($_POST['title']);
$story  = trim($_POST['story']);

$q  = "SELECT * ";
$q .= "FROM " . DB_NAME . ".`blog` ";
$q .= "WHERE `blog`.`id` = {$bId}";
$r = mysql_query($q, $connection);
//confirm_query($r);
if (mysql_num_rows($r) == 1) {      
    $q  = "UPDATE " . DB_NAME . ".`blog` SET
                        `title` = '{$title}',
                        `story` = '{$story}'
                    WHERE `id` = {$bId}";
    $r = mysql_query($q, $connection);
    if (mysql_affected_rows() == 1) {
        //Successful
        $data['success'] = true;
        $date['errors']  = false;
        $date['message'] = "You are the Greatest!";
    } else {
        //Fail
        $data['success'] = false;
        $data['error']   = true;
        $date['message'] = "You can't do it fool!";
    }        
}

I also get an “mysql_num_rows(): supplied argument is not a valid MySQL result resource” error too.

Side notes: I am using 1&1 Hosting (worst hosting ever), custom .htaccess file with one line text to enable PHP 5.2 (only way with 1&1 Hosting).

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Extra stuff add after the questions was posted…

Here is how $connection is defined. It is on its own page called connection.php that is called up using the require_once function. It it is called up on every page that require a database connection including the one in question…

$connection = mysql_connect(DB_SERVER,DB_USER,DB_PASS);
    if (!$connection) {
        die("Database Connection Failed: </br>" . mysql_error());
    }
    $db_select = mysql_select_db(DB_NAME,$connection);
    if (!$db_select) {
        die("Database Selection Failed: </br>" . mysql_error());
    }

… I know it is working because this the same connect that I use for the page I have and I have no problems with it. I havent testing on my home server yet, but I am going to later to see if it is related to a 1&1 Hosting issue.

UPDATE: I am in the process of moving from 1&1 Hosting to HostMoster. 1&1 runs a PHP as CGI and runs PHP4 instead of PHP5 (you can make a custom .htaccess file to make it run PHP5). I will update you later.

Answer 1

The first would be because it’s not a connection, and the second would be because it’s not a query result because it wasn’t a connection. Use mysql_error() to figure out what went wrong in the connection.