好的帮助..我的注册页面在本地服务器上工作，但它现在说这两个mysql行在其在线时无效。为什么它在线上时会改变？粘贴的代码就是所有相关的。由于某种原因，它不喜欢交易...和电子邮件检查mysql位
include 'Connect.php'; //Connects to database
//When form is submit:-
if(isset($_POST['submit']))
{
// On submit, retrieve table values for php.
$Firstname = mysql_real_escape_string($_POST['firstname']);
$Surname = mysql_real_escape_string($_POST['surname']);
$Password = mysql_real_escape_string($_POST['password']);
$PasswordCheck = mysql_real_escape_string($_POST['passwordcheck']);
$Email = mysql_real_escape_string($_POST['email']);
$EmailCheck = mysql_real_escape_string($_POST['emailcheck']);
//CHECKS.
//Check username is available by retrieving any same values from the DB table.
$CheckEmailAvailable = mysql_query("SELECT * FROM 'user_details' WHERE Email = '$Email'");
echo $CheckEmailAvailable;
// $result = mysql_query("SELECT * FROM $tbl WHERE Email='$email' and LoginPassword='$password'");
$Results = mysql_fetch_array($CheckEmailAvailable);
//If Username field is blank.
if($Email == null )
{
echo "You must enter an email address.";
$url = htmlspecialchars($_SERVER['HTTP_REFERER']);
echo "<br/><br/>";
echo "<a href='$url'>Click Here To Return</a>";
die();
}
//If RESULTS is any value other than NULL, die.
if($Results != null )
{
echo "Email already taken. Please try another.";
$url = htmlspecialchars($_SERVER['HTTP_REFERER']);
echo "<br/><br/>";
echo "<a href='$url'>Click Here To Return</a>";
die();
}
//If Password and PasswordCheck fields in reg do not match, die.
if($Password != $PasswordCheck)
{
echo "The passwords you have entered do not match. Please try again.";
$url = htmlspecialchars($_SERVER['HTTP_REFERER']);
echo "<br/><br/>";
echo "<a href='$url'>Click Here To Return</a>";
die();
}
//If Password field is NULL (i.e. blank) die.
if($Password == Null)
{
echo "Your password must not be blank.";
$url = htmlspecialchars($_SERVER['HTTP_REFERER']);
echo "<br/><br/>";
echo "<a href='$url'>Click Here To Return</a>";
die();
}
//If Email and EmailCheck are not equal, die.
if($Email != $EmailCheck)
{
echo "The email addresses you have entered do not match. Please try again.";
$url = htmlspecialchars($_SERVER['HTTP_REFERER']);
echo "<br/><br/>";
echo "<a href='$url'>Click Here To Return</a>";
die();
}
//ELSE add data to DB.
else
{
//BEGIN TRANS
mysql_query("BEGIN TRAN");
//TABLE ADD.
$sql=mysql_query("INSERT INTO `user_details` (`Firstname`, `Surname`, `Email`, `Password`) VALUES ('$Firstname', '$Surname', '$Email', '$Password')")
or mysql_query("ROLLBACK TRAN") . die(mysql_error("Error registering, the database may be down, please try again later."));
//COMMIT transaction, to ensure data is added properly.
mysql_query("COMMIT TRAN");
header( 'Location: RegSucc.php' ) ;
}
} ?>
<html>
<!--Registration Form-->
<form name="form1" method="post" style="margin-left: 28%" action="Register.php">
<table width="100%" border="0" cellpadding="3" cellspacing="1">
<tr>
<td colspan="3"><strong>Register Account</strong></td>
</tr>
<tr>
<td style="width: 83px">First Name:</td>
<td>:</td>
<td><input name="firstname" type="text"/></td>
</tr>
<tr>
<td style="width: 83px">Surname:</td>
<td>:</td>
<td><input name="surname" type="text"/></td>
</tr>
<tr>
<td style="width: 83px">Email Address:</td>
<td>:</td>
<td><input name="email" type="text"/></td>
</tr>
<tr>
<td style="width: 83px">Email Address Confirmation:</td>
<td>:</td>
<td><input name="emailcheck" type="text"/></td>
</tr>
<tr>
<td style="width: 83px">Password:</td>
<td>:</td>
<td><input name="password" type="password"/></td>
</tr>
<tr>
<td style="width: 83px">Verify Password:</td>
<td>:</td>
<td><input name="passwordcheck" type="password"/></td>
</tr>
<tr>
<td style="width: 83px"> </td>
<td> </td>
<td><input type="submit" name="submit" value="Register"/></td>
</tr>
</table>
</form>
答案 0 :(得分：1)
查询
SELECT * FROM 'user_details' WHERE Email = '$Email'
无效。表示表名时，最好使用反引号，但使用引号不起作用！
SELECT * FROM `user_details` WHERE Email = '$Email'
在您的本地主机上，可以设置为使用引号。但是，这不是它“应该”的方式，服务器的安装可能会有所不同。故事的道德：不要走捷径或使用丑陋的代码。不要忘记反引用表名或列，不要使用PHP短标签等。
答案 1 :(得分：0)
$sql=mysql_query("INSERT INTO `user_details` (`Firstname`, `Surname`, `Email`, `Password`) VALUES ('$Firstname', '$Surname', '$Email', '$Password')")
应该是
$sql=mysql_query("INSERT INTO user_details (Firstname, Surname, Email, Password) VALUES ('$Firstname', '$Surname', '$Email', '$Password')")
另外
SELECT * FROM 'user_details' WHERE Email = '$Email'
应该是
SELECT * FROM user_details WHERE Email = '$Email'
就是这样......
答案 2 :(得分：0)
更改此行
$CheckEmailAvailable = mysql_query("SELECT * FROM 'user_details' WHERE Email = '$Email'");
到
$CheckEmailAvailable = mysql_query("SELECT * FROM user_details WHERE Email = '".$Email."'");
问题是当你在线移动到另一台服务器时（我猜你是在Windows上开发[在MySQL中不区分大小写]，而你的在线服务器是Linux [在MySQL中区分大小]
如果您的字符串包含要评估和解析的变量，则在包含该字符串的双引号内使用该变量名称旁边的单引号并不是那么可靠。最好的方法（来自个人经历）是进行连接。