我在PHP中更改密碼腳本,我想要做的是從前一個屏幕中輸入用戶輸入的變量,然後將它們與MySQL數據庫進行比較。如果舊密碼與他們放入的不匹配,我希望它失敗並出現錯誤。這是我到目前爲止的代碼..但我知道比較一個字符串與變量不會工作,但需要知道如何轉換它們,以便他們可以比較。以下是有問題的頁面。在PHP中更改密碼
密碼當前存儲在數據庫的普通txt中,但稍後將更改爲md5。問題是如何將輸入值與從db中拉出的值進行比較?
<html>
<head>
<title>Password Change</title>
</head>
<body>
<?php
mysql_connect("localhost", "kb1", "BajyXhbRAWSVKPsA") or die(mysql_error());
mysql_select_db("kb1") or die(mysql_error());
$todo=mysql_real_escape_string($_POST['todo']);
$username=mysql_real_escape_string($_POST['userid']);
$password=mysql_real_escape_string($_POST['password']);
$password2=mysql_real_escape_string($_POST['password2']);
$oldpass=mysql_real_escape_string($_POST['oldpass']);
/////////////////////////
if(isset($todo) and $todo == "change-password"){
//Setting flags for checking
$status = "OK";
$msg="";
//MYSQL query to pull the current password from the database and store it in $q1
$results = mysql_query("SELECT password FROM kb_users WHERE username = '$username'") or die(mysql_error());
$q1 = mysql_fetch_array($results);
//print_r($q1)
//changing the string $oldpass to using the str_split which converts a string to an array.
//$oldpass1 = str_split($oldpass,10);
if(!$q1)
{
echo "The username <b>$username</b> does not exist in the database. Please click the retry button to attempt changing the password again. <BR><BR><font face='Verdana' size='2' color=red>$msg</font><br><center><input type='button' value='Retry' onClick='history.go(-1)'></center>"; die();
}
if ($oldpass == $q1){
$msg = $msg. "The provided password <b>$oldpass</b> is not the same as what is in the database. Please click the retry button to attempt changing the password again.<BR><br>";
$status = "NOTOK";}
/*
if ($q1 <> $oldpass1) {
$msg = $msg. "The provided password <b>$oldpass</b> is not the same as what is in the database. Please click the retry button to attempt changing the password again.<BR><br>";
$status = "NOTOK"; }
*/
if (strlen($password) < 3 or strlen($password) > 10){
$msg=$msg. "Your new password must be more than 3 char legth and a maximum 10 char length<BR><BR>";
$status= "NOTOK";}
if ($password <> $password2){
$msg=$msg. "Both passwords are not matching<BR>";
$status= "NOTOK";}
if($status<>"OK")
{
echo "<font face='Verdana' size='2' color=black>$msg</font><br><center> <input type='button' value='Retry' onClick='history.go(-1)'></center>";
}
else {
// if all validations are passed.
if (mysql_query("UPDATE kb_users SET password='$password' where username='$username'") or die(mysql_error()));
{
echo "<font face='Verdana' size='2' ><center>Thanks <br> Your password has been changed successfully. Please keep changing your password for better security</font></center>";
}
}
}
?>
</body>
</html>
您的代碼很容易出現http://en.wikipedia.org/wiki/SQL_injection – 2012-03-23 23:49:20
你是如何存儲在你的數據庫密碼? – 2012-03-23 23:50:16
很好。你有什麼問題?查看http://stackoverflow.com/questions/how-to-ask獲取有關問好(和可回答)問題的指南。 – Hamish 2012-03-23 23:57:36