我想根据用户输入更新我的数据库中的2个字段。我的代码是这样的:
<body>
<?php
$db_server["host"] = "localhost"; //database server
$db_server["username"] = "root"; // DB username
$db_server["password"] = "mypass"; // DB password
$db_server["database"] = "mudb";// database name
$dbc = mysql_connect($db_server["host"], $db_server["username"], $db_server["password"]);
mysql_select_db($db_server["database"], $dbc);
$user = $_COOKIE['mycookie'];
$q = "SELECT * FROM members WHERE username='$user'";
$r = mysql_query( $q,$dbc);
while ($row = mysql_fetch_array($r, MYSQLI_ASSOC)) {
echo 'username: '.$row['username'], '<br/>';
$password=$row['password'];
?>
<form method="post" id="changepasswordform" >
<input type="password" id="newpassword" name="newpassword"/>
<input type="submit" name="changepasswordbutton" >
</form>
<?php
echo 'email: '.$row['email'], '<br/>';
}
?>
<form method="post" id="changeemailform" >
<input type="text" id="newemail" name="newemail"/>
<input type="submit" value="αλλαγή" name="changeemailbutton" >
</form>
<?php
}
if (isset($_POST['changepasswordbutton'])){
$newpassword=$_POST['newpassword'];
$q2 = "UPDATE members SET password=$newpassword WHERE username='$user'";
$r2 = mysql_query($q2,$dbc);
}
if (isset($_POST['changeemailbutton'])){
$newemail=$_POST['newemail'];
$q3 = "UPDATE members SET email=$newemail WHERE username='$user'";
$r3 = @mysql_query( $q3,$dbc);
}
?>
</body>
然而,虽然我尝试UPDATE时我的数据库连接正常(SELECT显示结果符合预期),但我的数据库中的值保持不变。我检查了$ newpassword和$ newemail的值,它们确实包含了用户每次输入。我在这里缺少什么?
答案 0 :(得分:4)
您错过了应该围绕密码字段的''
(引号)。
改变:
UPDATE members SET password=$newpassword WHERE username='$user'
为:
UPDATE members SET password='{mysql_real_escape_string($password)}'
WHERE username='{mysql_real_escape_string($user)}'
重要:强>
尽管它没有相关性,但请不要使用mysql_*
函数 - 它已被弃用且易受sql注入攻击。更好地使用PDO或MySQLi。
答案 1 :(得分:2)
这将解决问题,并为sql注入保存(mysql_real_escape_string
):
$q2 = "UPDATE members SET
password='". mysql_real_escape_string($password) ."'
WHERE username='". mysql_real_escape_string($user) ."';
但是当然你不应该再使用mysql_*
,我只是举例说明你的具体情况。