Question

我的代码中存在if循环，而我没有将$ _GET ['err']分配给变量。

我刚刚登录到我的网页。我没有更改密码。未更改任何密码都会显示有关更改密码的错误消息。我是一个初学者，所以我没什么主意。

<body>
<div class="header">
<div class="logo">
<img src="images/l.png" alt="aczel logo">
</div>
<div class="nav">
<h1>aczel quality team</h1>
<ul>
<li class="active"><a href="#">Home Page</a></li>
<li onclick="c_p()" ><a href="#">change password</a></li>
</ul>
<!--[if !IE]> -->
<div id="mycp" class="cp">
<span class="cp_close"
onclick="document.getElementById('mycp').style.display='none'">&times;                                                            
</span>
<div>
<form action="user_cp.php " method="post">
<input type="password" name="old_pswd" placeholder="ENTER OLD PASSWORD">
<input type="password" name="new_pswd" placeholder="ENTER NEW PASSWORD">
<input type="password" name="c_pswd" placeholder="CONFIRM NEW PASSWORD">
<input type="submit" name="change_pswd" value="CHANGE PASSWORD">
</form>
</div>
</div>
<script type="text/javascript" src="js/modal.js">
</script>
<!-- <![endif]-->
</div>
</div>
<?php
/*displaying error message for empty password change*/
if($_GET['err'] == 1)
{ 
echo "<div class='msg'><h2>Fields are empty</h2></div>";
}
/*displaying error message for !match passwords*/
if($_GET['err'] == 2)
{ 
echo "<div class='msg'><h2>Old Password Does Not Match</h2></div>";
}
/*displaying error message for new password and confirm pwd dont match */
if($_GET['err'] == 3)
{ 
echo "<div class='msg'><h2>New Pwd != confirm Password</h2></div>";
}
/*displaying success message on password change*/
if($_GET['success'] == 1)
{ 
echo "<div class='msg'><h2>Password changed</h2></div>";
}
?>

这些错误消息在我们登录时不会出现。而是在我们使用网页中的密码更改选项时显示它们。

Answer 1

您要在GET数组中请求不存在的值，而无需测试是否设置了它们-您需要在派生逻辑之前先进行测试-例如：

if( isset( $_GET['err'] ) ){
    if($_GET['err'] == 1){ 
        echo "<div class='msg'><h2>Fields are empty</h2></div>";
    }
    /*displaying error message for !match passwords*/
    if($_GET['err'] == 2){ 
        echo "<div class='msg'><h2>Old Password Does Not Match</h2></div>";
    }
    /*displaying error message for new password and confirm pwd dont match */
    if($_GET['err'] == 3){ 
        echo "<div class='msg'><h2>New Pwd != confirm Password</h2></div>";
    }
    /*displaying success message on password change*/
    if( isset( $_GET['success'] ) && $_GET['success'] == 1){ 
        echo "<div class='msg'><h2>Password changed</h2></div>";
    }
}

或者，也许是更紧凑的版本

if( isset( $_GET['err'] ) ){
    switch( intval( $_GET['err'] ) ){
        case 1:$msg='Fields are empty';break;
        case 2:$msg='Old Password Does Not Match';break;
        case 3:$msg='New Pwd != confirm Password';break;
    }
}
if( isset( $_GET['success'] ) && $_GET['success']==1 ){
    $msg='Password changed';
}

printf('<div class="msg"><h2>%s</h2></div>',$msg);

注意：未定义索引：第89,94,99,104行的C：\ xampp \ htdocs \ quality \ home.php中的err

1 个答案: