php - 在 PHP 中使用电子邮件和密码注册后无法登录

Question

这是我的注册代码。

 <?php
              include_once('config.php');
                 $uname=mysql_real_escape_string($_POST["fname"]);
              $email = mysql_real_escape_string( $_POST["email"] );
              $phone=mysql_real_escape_string($_POST["phone"]);
              $country = mysql_real_escape_string( $_POST["country"] );
              $region = mysql_real_escape_string( $_POST["region"] );
              $zip = mysql_real_escape_string($_POST["zip"]) ;
              $upass = mysql_real_escape_string( md5($_POST["password"]) );



              if( empty($uname) || empty($email) || empty($phone) || empty($country) || empty($region) || empty($zip) || empty($upass)  )
              {
                echo "all fields are mandatory - from PHP!";
                exit();
              }


         $res = mysql_query("SELECT email FROM registration WHERE email='$email'");
              $row = mysql_num_rows($res);

              if( $row > 0 ){
                echo "email $email has already been taken";
              }
              else
              {
                  $sql = mysql_query("INSERT INTO registration (fname,email,phone,country,region,zip,password)VALUES(
                                                   '$uname', 
                                                   ' $email', 
                                                   '$phone', 
                                                   '$country',
                               '$region',
                               '$zip',
                               '$upass' )");

                if($sql){
                 echo "Inserted Successfully";
                }
               else
                 echo "Insertion Failed";
            }
        ?>

这是我的登录 php 代码....

<?php
session_start();
        include_once('config.php');
        $email = mysql_real_escape_string( $_POST["email"] );
        $password = mysql_real_escape_string( md5($_POST["password"]) );

        if( empty($email) || empty($password) ){
            echo "Email and Password Mandatory ";
        }
        else
        {
            $sql = mysql_query("SELECT fname FROM registration WHERE(
                       email='$email' 
                    AND 
                    password='$password')");
            while($row = mysql_fetch_array($sql)){
                $_SESSION['user_name'] =  $row['fname'];
            }
                //$res = mysql_query($sql);
        //$row = mysql_fetch_array($res);
        if( $_SESSION['user_name']!= '' )
         echo "<script>location.href='../index.php?con=1'</script>";
        else
         echo "Failed To Login";
        }       
?>

登录后报错...

注意:未定义索引:C:\xampp\htdocs\cinderella\php\login.php 中第 21 行的 user_name 登录失败//

** 此问题的任何线索都非常值得赞赏...谢谢 **

Answer 1

检查您的插入查询，$email 字段中有一个空格。

$sql = mysql_query("INSERT INTO registration (fname,email,phone,country,region,zip,password)VALUES(
                           '$uname', 
        WHITESPACE ------> ' $email',
                           '$phone', 
                           '$country',`