Warning: mysql_num_rows(): supplied argument is not a valid ...

[|V|emphis]

Kann mir vielleicht jemand sagen wieso dieser Fehler kommt:

"Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in C:\Apache2\htdocs\bumspara2\index.php on line 5"

meine index.php sieht folgendermaßen aus:

<?php
    include "inc/config.inc.php";
    
    $res = mysql_query("select userid from tb_online where userid > 0");
    $num = mysql_num_rows($res);
        
    include "inc/header.inc.php";
    
    
    if ($num != 0) {
        echo "INHALT";
    }
    else {
        echo "Kein Zugang!";
        include "inc/login.inc.php";
    }
    
    include "inc/left.inc.php";
    
    include "inc/iFrame.inc.php";
    echo "src='start.php'";
    include "footer.inc.php";
?>

[mrhappiness]

$res = mysql_query("...") or die(mysql_error());

[|V|emphis]

thx

hatten in der config nen falschen db namen. jetzt gehts.

[TobiaZ]

nächstes mal erst suche!

*verschieb*