[PHP] Warning: Invalid argument supplied for foreach()

[arnaud gonzales]

Hi all,
I am getting crazy, can't understand what i missed!
Does anybody know?

$champs = array ("titre_art" => "h3" ,"nom" => "bleu", "prenom" => "green",
"resume" => "bold");

foreach($champs as $key => $value) {


    echo "<td class='$value'>$row($key))</td>";
             }

TIA.
            zeg