php-初學PHP，這段測試代碼的初始化錯在哪兒？怎麼改？

phphtml

 $number_to_guess)        $message = $_POST['guess']." is too big, Try a smaller one!";    else if($_POST['guess'] < $number_to_guess)        $message = $_POST['guess']." is too small, Try a bigger one!";    else        $message = "I am terribly confused!";    echo $_SERVER['PHP_SELF'];?>            A HTML/PHP that calls itself!            
 \"".$message."\""; ?> 
    
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