我正在编写一段代码,在完成以下表单后更改数据库中的密码:
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>Password Change</title>
</head>
<body>
<h1>Change Password</h1>
<form method="POST" action="password_change.php">
<table>
<tr>
<td>Enter your UserName</td>
<td><input type="username" size="10" name="username"></td>
</tr>
<tr>
<td>Enter your existing password:</td>
<td><input type="password" size="10" name="password"></td>
</tr>
<tr>
<td>Enter your new password:</td>
<td><input type="password" size="10" name="newpassword"></td>
</tr>
<tr>
<td>Re-enter your new password:</td>
<td><input type="password" size="10" name="confirmnewpassword"></td>
</tr>
</table>
<p><input type="submit" value="Update Password">
</form>
<p><a href="home.php">Home</a>
<p><a href="logout.php">Logout</a>
</body>
</html>
和PHP:
<?php
session_start();
include 'dbconfig.php';
$username = $_POST['username'];
$password = $_POST['password'];
$newpassword = $_POST['newpassword'];
$confirmnewpassword = $_POST['confirmnewpassword'];
$result = mysql_query("SELECT password FROM user_info WHERE
user_id='$username'");
if(!$result)
{
echo "The username you entered does not exist";
}
else if($password!= mysql_result($result, 0))
{
echo "You entered an incorrect password";
}
if($newpassword=$confirmnewpassword)
$sql=mysql_query("UPDATE user_info SET password='$newpassword' where
user_id='$username'");
if($sql)
{
echo "Congratulations You have successfully changed your password";
}
else
{
echo "Passwords do not match";
}
?>
我现在遇到的问题是,当我提交提交按钮时,会将我带到此代码的只读页面.
有什么建议？
初看起来我可以搞清楚你犯的几个重大错误:
如果你比较你应该使用
$newpassword == $confirmnewpassword
并不是
$newpassword=$confirmnewpassword
其次当你使用if..elseif ...循环格式时
if (condition)
{
//code to be executed if condition is true;
}
else if (condition)
{
// code to be executed if condition is true;
}
else
{
//code to be executed if condition is false;
}
你显然错过了其中一个循环中的else部分.请更正您的语法,然后重试......