我的帐户上的语法错误\u settings.php

我正在学习一个在线教程。问题是我越来越

语法错误在最后一个ELSE的第二个上出现意外的T_ELSE PHP空白

我曾尝试使用notepad++对PHP空白进行排序，但它不会消失。我目前正在使用PHP8。错误可能来自哪里

这是我的帐户设置.php页面：

<?php
include( "header inc.php" ); 
if (!$user) {

}
else
{
 die ("You must be logged in to view this page!");
}
?>
<?php
$senddata = @$_POST['senddata'];

//Password variables
  $old_password = mysqli_real_escape_string($mysqli,@$_POST['oldpassword']);
  $new_password = mysqli_real_escape_string($mysqli,@$_POST['newpassword']);
  $repeat_password = mysqli_real_escape_string($mysqli,@$_POST['newpassword2']);
if ($senddata) 
    //If the form is submitted..

     $password_query = $mysqli->query("SELECT * FROM users WHERE username='$user'");
  while ($row = mysqli_fetch_assoc($password_query)) {
        $db_password = $row['password'];

        //md5 the old password before we check if it matches
        $old_password_md5 = md5($old_password);

        //Check whether old password equals $db_password
        if ($old_password_md5 == $db_password) {
         //Continue Changing the users password ...
         //Check whether the 2 new passwords match
         if ($new_password == $repeat_password) {

            //md5 the new password before we add it to the database
            $new_password_md5 = md5($new_password);
           //Great! Update the users passwords!
           $password_update_query = $mysqli->query("UPDATE users SET password='$new_password_md5' WHERE username='$user'");
           echo "Success! Your password has been updated!"; 
           }
           }
           else
           {
            echo "Your two new passwords don't match!";
            }
            }
            else
            {
                echo "The old password is incorrect!";
                }
                }
                else
                {
                    echo "";
                    }

?>
<h2>Edit your Account Settings below</h2>
<hr /> 
<form action="account_settings.php" accept-charset="utf-8" method="post">
<p>CHANGE YOUR PASSWORD:</p> <br />
Your Old Password: <input type="text" name="oldpassword" id="oldpassword" size="40"><br />
Your New Password: <input type="text" name="newpassword" id="newpassword" size="40"><br />
Repeat Password  : <input type="text" name="newpassword2" id="newpassword2" size="40"><br />

<hr />
<p>UPDATE YOUR PROFILE INFO:</p> <br />
First Name: <input type="text" name="fname" id="fname" size="40" value="<? echo $db_first_name; ?>"><br />
Last Name: <input type="text" name="lname" id="lname" size="40" value="<? echo $db_last_name; ?>"><br />
About You: <textarea name="about you" id="about you" rows="7" cols="40"></textarea>

<hr />
<input type="submit" name="senddata" id="senddata" value="Update Information">
</form>  

语法错误出现在
else
条件中

试一试


最后，下面提到的else没有IF

 }
               else
            {
                echo "";
                }

修正了，试试这个：

    <?php
    include( "header inc.php" ); 
    if (!$user) {

    }
    else
    {
     die ("You must be logged in to view this page!");
    }
    ?>
    <?php
    $senddata = @$_POST['senddata'];

    //Password variables
      $old_password = mysqli_real_escape_string($mysqli,@$_POST['oldpassword']);
      $new_password = mysqli_real_escape_string($mysqli,@$_POST['newpassword']);
      $repeat_password = mysqli_real_escape_string($mysqli,@$_POST['newpassword2']);
    if ($senddata) {

        //If the form is submitted..

         $password_query = $mysqli->query("SELECT * FROM users WHERE username='$user'");
      while ($row = mysqli_fetch_assoc($password_query)) {
            $db_password = $row['password'];

            //md5 the old password before we check if it matches
            $old_password_md5 = md5($old_password);

            //Check whether old password equals $db_password
            if ($old_password_md5 == $db_password) {
             //Continue Changing the users password ...
             //Check whether the 2 new passwords match
             if ($new_password == $repeat_password) {

                //md5 the new password before we add it to the database
                $new_password_md5 = md5($new_password);
               //Great! Update the users passwords!
               $password_update_query = $mysqli->query("UPDATE users SET password='$new_password_md5' WHERE username='$user'");
               echo "Success! Your password has been updated!"; 
               }
               }
               else
               {
                echo "Your two new passwords don't match!";
                }
                }
    } 
                else
                {
                    echo "The old password is incorrect!";
                    }

    ?>
    <h2>Edit your Account Settings below</h2>
    <hr /> 
    <form action="account_settings.php" accept-charset="utf-8" method="post">
    <p>CHANGE YOUR PASSWORD:</p> <br />
    Your Old Password: <input type="text" name="oldpassword" id="oldpassword" size="40"><br />
    Your New Password: <input type="text" name="newpassword" id="newpassword" size="40"><br />
    Repeat Password  : <input type="text" name="newpassword2" id="newpassword2" size="40"><br />

    <hr />
    <p>UPDATE YOUR PROFILE INFO:</p> <br />
    First Name: <input type="text" name="fname" id="fname" size="40" value="<? echo $db_first_name; ?>"><br />
    Last Name: <input type="text" name="lname" id="lname" size="40" value="<? echo $db_last_name; ?>"><br />
    About You: <textarea name="about you" id="about you" rows="7" cols="40"></textarea>

    <hr />
    <input type="submit" name="senddata" id="senddata" value="Update Information">
    </form>  


请正确缩进您的代码以便更容易理解。我目前正在使用PHP8，那个么怎么样？为什么会有反对票？哦，上帝，他使用md5散列他的密码。。。请迁移到新的PHP5.5密码哈希API（甚至还有5.3和5.4的库）。@Antony您的代码存在一些严重的缩进问题。当然，这并不是问题的根源，但是，它让阅读变得困难。想想看。@Antony如果你觉得我的答案有用，请接受。谢谢Hassaan，bt。新的问题是，当我尝试更改表单上的密码时，没有发生任何情况，如果我使用你编辑的答案，错误会回来。我使用你的第一个答案。它不存在，所以我坚持使用1st@Antony现在请用我的新答案。我有，该错误已消失，但表单不起作用。当我更改密码并按enter/update info时，它只需重新加载即可帮助我解决当前遇到的新问题？该页面不起作用
 }
               else
            {
                echo "";
                }

    <?php
    include( "header inc.php" ); 
    if (!$user) {

    }
    else
    {
     die ("You must be logged in to view this page!");
    }
    ?>
    <?php
    $senddata = @$_POST['senddata'];

    //Password variables
      $old_password = mysqli_real_escape_string($mysqli,@$_POST['oldpassword']);
      $new_password = mysqli_real_escape_string($mysqli,@$_POST['newpassword']);
      $repeat_password = mysqli_real_escape_string($mysqli,@$_POST['newpassword2']);
    if ($senddata) {

        //If the form is submitted..

         $password_query = $mysqli->query("SELECT * FROM users WHERE username='$user'");
      while ($row = mysqli_fetch_assoc($password_query)) {
            $db_password = $row['password'];

            //md5 the old password before we check if it matches
            $old_password_md5 = md5($old_password);

            //Check whether old password equals $db_password
            if ($old_password_md5 == $db_password) {
             //Continue Changing the users password ...
             //Check whether the 2 new passwords match
             if ($new_password == $repeat_password) {

                //md5 the new password before we add it to the database
                $new_password_md5 = md5($new_password);
               //Great! Update the users passwords!
               $password_update_query = $mysqli->query("UPDATE users SET password='$new_password_md5' WHERE username='$user'");
               echo "Success! Your password has been updated!"; 
               }
               }
               else
               {
                echo "Your two new passwords don't match!";
                }
                }
    } 
                else
                {
                    echo "The old password is incorrect!";
                    }

    ?>
    <h2>Edit your Account Settings below</h2>
    <hr /> 
    <form action="account_settings.php" accept-charset="utf-8" method="post">
    <p>CHANGE YOUR PASSWORD:</p> <br />
    Your Old Password: <input type="text" name="oldpassword" id="oldpassword" size="40"><br />
    Your New Password: <input type="text" name="newpassword" id="newpassword" size="40"><br />
    Repeat Password  : <input type="text" name="newpassword2" id="newpassword2" size="40"><br />

    <hr />
    <p>UPDATE YOUR PROFILE INFO:</p> <br />
    First Name: <input type="text" name="fname" id="fname" size="40" value="<? echo $db_first_name; ?>"><br />
    Last Name: <input type="text" name="lname" id="lname" size="40" value="<? echo $db_last_name; ?>"><br />
    About You: <textarea name="about you" id="about you" rows="7" cols="40"></textarea>

    <hr />
    <input type="submit" name="senddata" id="senddata" value="Update Information">
    </form>