if (!$user_class->invincible) {
    if (!$defender->invincible) {
        while ($yourhp > 0 && $theirhp > 0) {
            $damage = round($defender->moddedstrength) - $user_class->moddeddefense;
            $damage = ($damage < 1) ? 1 : $damage;
            if (!$wait) {
                $yourhp = $yourhp - $damage;
                ++$number;
                $log[] = $number . ":&nbsp;" . $defender->formattedname . " hit you for " . prettynum($damage) . " damage using their " . $defender->weaponname . ". <br />";
            } else
                $wait = 0;
            if ($yourhp > 0) {
                $damage = round($user_class->moddedstrength) - $defender->moddeddefense;
                $damage = ($damage < 1) ? 1 : $damage;
                $theirhp = $theirhp - $damage;
                ++$number;
                $log[] = $number . ":&nbsp;" . "You hit " . $defender->formattedname . " for " . prettynum($damage) . " damage using your " . $user_class->weaponname . ". <br />";
            }
        }
        $log = array_slice($log, -10, 10, true);
        foreach($log as $text)
            echo $text;
    } else
        $yourhp = 0;
} else
    $theirhp = 0;