解析错误:语法错误，寄存器系统中意外的“if”(T_IF） - Parse error: syntax error, unexpected 'if' (T_IF), in register system

Parse error: syntax error, unexpected 'if' (T_IF), in register system

我的php代码中遇到了问题，说我：解析错误：语法错误，意外的"如果"（T_IF），我试图修复很多时间，但没有结果。无论如何，我的代码是：

 <?php
    include 'header.php';
    include 'config.php';
    include 'footer.php';
    ?>
<?php
if(isset($_POST['rgstdo'])){
$u_name = strip_tags($_POST['u_name']);
$u_pwd = md5($_POST['u_pwd']);
$u_email = strip_tags($_POST['u_email']);
if(!empty($u_name) or !empty($u_pwd) or !empty($u_email)){
    $u_name = strip_tags($_POST['u_name']);
    $u_pwd = md5($_POST['u_pwd']);
    $u_email = strip_tags($_POST['u_email']);
        }
if(empty($u_name) or empty($u_pwd) or empty($u_email)){
        echo "<div class='alert alert-danger' role='alert'>ERROR, All fields were filled</div>";
    }else{ 
        $dbadduser = mysql_query("INSERT INTO admins
         ('u_name','u_pwd','u_email') 
         VALUES
         ('$u_name','$u_pwd','$u_email')") or die (mysql_error());
        if(isset($dbadduser)){
            echo "<div class='alert alert-success' role='alert'>Done, now you can login</div>";
            include './/index.php'
            exit;()
        }
    }
}

?>

错误消息： Parse error: syntax error, unexpected 'if' (T_IF) in C:'xampp'htdocs'kownload'path'admin-rgst.php on line 29

<?php
include 'header.php';
include 'config.php';
include 'footer.php';
if(isset($_POST['rgstdo'])){
    $u_name = strip_tags($_POST['u_name']);
    $u_pwd = md5($_POST['u_pwd']);
    $u_email = strip_tags($_POST['u_email']);
    if(!empty($u_name) or !empty($u_pwd) or !empty($u_email)){
        $u_name = strip_tags($_POST['u_name']);
        $u_pwd = md5($_POST['u_pwd']);
        $u_email = strip_tags($_POST['u_email']);
    }
    if(empty($u_name) or empty($u_pwd) or empty($u_email)){
        echo "<div class='alert alert-danger' role='alert'>ERROR, All fields were filled</div>";
    }
    else {
        $dbadduser = mysql_query("INSERT INTO admins ('u_name','u_pwd','u_email') VALUES ('$u_name','$u_pwd','$u_email')") or die (mysql_error());
        if(isset($dbadduser)){
            echo "<div class='alert alert-success' role='alert'>Done, now you can login</div>";
            include './/index.php';
            exit();
        }
    }
}
?>

刚刚删除了代码中的特殊字符。并将exit;()中的分号';'更正为 exit();

我使用 mysqli所以我添加mysql_query（）而不是mysqli_query（）是我的错误

<?php
include 'header.php';
include 'footer.php';
if(isset($_POST['rgstdo'])){
    $u_name = strip_tags($_POST['u_name']);
    $u_pwd = md5($_POST['u_pwd']);
    $u_email = strip_tags($_POST['u_email']);
    if(!empty($u_name) or !empty($u_pwd) or !empty($u_email)){
        $u_name = strip_tags($_POST['u_name']);
        $u_pwd = md5($_POST['u_pwd']);
        $u_email = strip_tags($_POST['u_email']);
    }
    if(empty($u_name) or empty($u_pwd) or empty($u_email)){
        echo "<div class='alert alert-danger' role='alert'>ERROR, All fields were filled</div>";
    }
    else {
        $dbadmins = **mysqli_query** ("INSERT INTO admins ('u_name','u_pwd','u_email') VALUES ('$u_name','$u_pwd','$u_email')") or die (**mysqli_error**());
        if(isset($dbadmin)){
            echo "<div class='alert alert-success' role='alert'>Done, now you can login</div>";
            include './/index.php';
            mysqli_close($con);
        }
    }
}
?>