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  #1  
Old 06-20-2008, 08:00 PM
MessiAz MessiAz is offline
 
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Default read custom profile field.

i coded a php file to read a member's custom profile field.
do you see something bad in my code? is it safe to upload this file to my forum ?

PHP Code:
request
http
://xxxxxxxxxxx.com/forum/test.php?user=Tester


$username $_GET['user'];

$query  "SELECT userid FROM vb_user WHERE username='" $username "'";
$result mysql_query($query);
if(
mysql_num_rows($result) > 0)
{
    
$row mysql_fetch_row($result);
    
$userid $row[0];

    
$query "SELECT usergroupid FROM vb_user WHERE userid='" $userid "'";
    
$result mysql_query($query);

    if(
mysql_num_rows($result) > 0)
    {
        
$row mysql_fetch_row($result);
        
$group $row[0];

        
$query "SELECT field6 FROM vb_userfield WHERE userid='" $userid "'";
        
$result mysql_query($query);

        if(
mysql_num_rows($result) > 0)
        {
            
$row mysql_fetch_row($result);
            
$serial $row[0];

            echo 
"Username: " $username "<br>";
            echo 
"Userid: " $userid "<br>";
            echo 
"group: " $group "<br>";
            echo 
"programid: " $serial "<br>";
        }

    }

}

else {

echo 
"Username: Invalid";

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  #2  
Old 06-20-2008, 08:50 PM
MoT3rror MoT3rror is offline
 
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Default

PHP Code:
$username $_GET['user'];

/*
I suggest changing this query to, then you will only need 1 query then 3

SELECT user.userid, user.usergroupid, userfield.field6
FROM vb_user AS user
LEFT JOIN vb_userfield AS userfield ON (userfield.userid = user.userid)
WHERE user.username = '" . mysql_escape_string($username) . "'"
*/

//added mysql_escape_string to protect against sql injection
$query  "SELECT userid FROM vb_user WHERE username='" mysql_escape_string($username) . "'";
$result mysql_query($query);
if(
mysql_num_rows($result) > 0)
{
    
$row mysql_fetch_row($result);
    
//this should be userid not 0, you can var_dump for debug if you aren't getting the value you want
    
$userid $row['userid'];

    
//why not just select usergroupid from your first query?
    
$query "SELECT usergroupid FROM vb_user WHERE userid='" $userid "'";
    
$result mysql_query($query);

    if(
mysql_num_rows($result) > 0)
    {
        
$row mysql_fetch_row($result);
        
$group $row[0];

        
//you can use a left join with your first query to get this value also
        
$query "SELECT field6 FROM vb_userfield WHERE userid='" $userid "'";
        
$result mysql_query($query);

        if(
mysql_num_rows($result) > 0)
        {
            
$row mysql_fetch_row($result);
            
$serial $row[0];

            echo 
"Username: " $username "<br>";
            echo 
"Userid: " $userid "<br>";
            echo 
"group: " $group "<br>";
            echo 
"programid: " $serial "<br>";
        }

    }

}

else {

echo 
"Username: Invalid";

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  #3  
Old 06-20-2008, 09:22 PM
Opserty Opserty is offline
 
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Default

As MoT3rror suggested, you can cover everything in the single query so you have:
PHP Code:
$username $_GET['user'];

$sql "SELECT user.userid, user.usergroupid, userfield.field6
FROM vb_user AS user
LEFT JOIN vb_userfield AS userfield ON (userfield.userid = user.userid)
WHERE user.username = '" 
mysql_escape_string($username) . "' LIMIT 1";

$query mysql_query($sql);
// Do our error checking first...
if(!$query)
{
    echo 
'Username: Invalid';
}
else
{
    
// Use mysql_fetch_assoc to return [field] => [value] array result
    
$data mysql_fetch_assoc($query);
    
    
// Use single quotes if there are no variables in strings
    
echo 'Username: ' $username .'<br>';
    echo 
'Userid: ' $data['userid'] . '<br>';
    echo 
'Group: ' $data['usergroupid'] . '<br>';
    echo 
'programid: ' $data['field6'] . '<br>';

(Credit to MoT3rror for SQL)
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  #4  
Old 06-21-2008, 03:35 AM
Dismounted's Avatar
Dismounted Dismounted is offline
 
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Default

Using mysql_real_escape_string() is preferable to mysql_escape_string().
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