assegnare colori sfondo e bordi

[mybox]

faccio così ma mi da errore...

<?php 
rand(); 
$random1 = rand(0, hexdec("ffffff")); 
$random2 = rand(0, hexdec("ffffff")); 

echo "<form action=\"login.php\" method=\"get\">";
        echo "Nick:";
        echo "
";
        echo "<input type=\"text\" name=\"uid\" size=\"8\" maxlength=\"15\" style=\"background-color: #$random1\" />";         
               echo "
";
        echo "Password:";
        echo "
";
        echo "<input type=\"password\" name=\"pwd\" size=\"8\" maxlength=\"15\" style=\"background-color: #$random2\" />";
?>         echo "
";
        echo "<input type=\"hidden\" name=\"svw\" value=\"$svw\"/>";
        echo "<input type=\"submit\" value=\"login\"/>";
        echo "</form>";
                echo "
";

[Emulman]

togli immediatamente il ?> a metà codice..con quello le seguenti istruzioni PHP non vengono mica eseguite!

[mybox]

[/php]

<?php
rand();
$random1 = rand(0, hexdec("ffffff"));
$random2 = rand(0, hexdec("ffffff"));
?>

echo "<form action=\"login.php\" method=\"get\">";
echo "Nick:";

echo "
";
echo "<input type=\"text\" name=\"uid\" size=\"8\" maxlength=\"15\" style=\"background-color: #$random1\" />";
echo "
";

echo "Password:";

echo "
";

echo "<input type=\"password\" name=\"pwd\" size=\"8\" maxlength=\"15\" style=\"background-color: #$random2\" />";
echo "
";

echo "<input type=\"hidden\" name=\"svw\" value=\"$svw\"/>";

echo "<input type=\"submit\" value=\"login\"/>";

echo "</form>";

echo "
";
[/php]

NON funziona...
parse error:syntax error, '<'

[Emulman]

nlle prime righe

<?php
rand();
$random1 = rand(0, hexdec("ffffff"));
$random2 = rand(0, hexdec("ffffff"));
?>

togli il ?> finale e mettilo in fondo all'esempio

[mybox]

<?php 
rand(); 
$random1 = rand(0, hexdec("ffffff")); 
$random2 = rand(0, hexdec("ffffff"));
echo "<form action=\"login.php\" method=\"get\">";
    echo "Nick:";

echo "
";
echo "<input type=\"text\" name=\"uid\" size=\"8\" maxlength=\"15\" style=\"background-color: #$random1\" />";
echo "
";

echo "Password:";

echo "
";

echo "<input type=\"password\" name=\"pwd\" size=\"8\" maxlength=\"15\" style=\"background-color: #$random2\" />";
echo "
";
        
echo "<input type=\"hidden\" name=\"svw\" value=\"$svw\"/>";

echo "<input type=\"submit\" value=\"login\"/>";

echo "</form>";

echo "
";

?>

anche così errore... ma il ?> dove va messo???
penso di aver provato a metterlo ovunque ma nulla