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  • Javascript警报窗口重定向到另一个网页 警报（“用户名已存在！”）； window.location.href=“registeruser.php”； 警报（“需要电子邮件地址！”）； window.location.href=“registeruser.php”； 警报（“需要用户名！”）； window.location.href=“registeruser.php”；

Javascript警报窗口重定向到另一个网页 警报（“用户名已存在！”）； window.location.href=“registeruser.php”； 警报（“需要电子邮件地址！”）； window.location.href=“registeruser.php”； 警报（“需要用户名！”）； window.location.href=“registeruser.php”；

javascript php

Javascript警报窗口重定向到另一个网页 警报（“用户名已存在！”）； window.location.href=“registeruser.php”； 警报（“需要电子邮件地址！”）； window.location.href=“registeruser.php”； 警报（“需要用户名！”）； window.location.href=“registeruser.php”；,javascript,php,alert,Javascript,Php,Alert,使用基本url，然后将自定义路径粘贴到页面，如： if($fullName == "") { echo '<script>'; echo 'alert("Full Name is required!")'; echo 'window.location.href = "registeruser.php"'; echo '</script>'; } var MyBaseURL= var customURL=MyBaseURL。“/registeruser.

使用基本url，然后将自定义路径粘贴到页面，如：

if($fullName == "")
{
  echo '<script>';
  echo 'alert("Full Name is required!")';
  echo 'window.location.href = "registeruser.php"';
  echo '</script>';
}


var MyBaseURL=
var customURL=MyBaseURL。“/registeruser.php”；
警报（“需要全名！”）；
window.location.href=自定义URL；
您应该避免回显脚本，使用包含php标记的正则脚本块。

您应该将警报放在
registeruser.php
页面上。让PHP脚本执行以下操作：

<?php
if($fullName == "")
{
?>
  <script>
   var MyBaseURL = <?php echo BASE_URL_CONSTANT?>
   var customURL = MyBaseURL."/registeruser.php";
   alert("Full Name is required!");
   window.location.href = customURL;
  </script>
<?php
}
?>
然后，
registeruser.php
可以执行以下操作：

header("Location: registeruser.php?message=" . urlencode("Invalid username"));


警惕（）；

可能在会话_start（）之后尝试呈现一些html。
e、 g



登录信息


这将为消息提供一个显示页面。

不过，在我看来，更好的是：不要脱离php，在需要的地方使用php header（）函数将您带到适当的页面。
尝试如下使用：


<html>
<head>
</head>
<body>
<h1>Login Message</h1>
</body>
</html>



if（$fullName==“”）
{
回显“警报（'需要全名！'）”；
echo“window.location.replace（'page.php？id=“.crmId.”）；”；
}

您可以使用此代码


if($fullName == "")
{
    echo "<script language='javascript'>alert('Full Name is required!')</script>";
    echo "<script language='javascript'>window.location.replace('page.php?id=".$crmId."'); </script>";
}




如果（警告（“用户名已存在！”）
{
window.location.href=“registeruser.php”；
}
如果（警告（“需要电子邮件地址！”）
{
window.location.href=“registeruser.php”；
}
如果（警告（“需要用户名！”）
{
window.location.href=“registeruser.php”；
}

正如其他人所说，您需要将逻辑移到HTML的末尾。其次，您需要在要加载的页面上实现此逻辑，而不是在重定向的页面上。这是一个两步逻辑。例如：

您需要在当前脚本中实现window.location

然后，就在页面标记之前，您希望重定向用户：


    <?php

session_start();

include_once "connect.php";

$fullName = $_POST['fullname'];
$userName = $_POST['username'];
$emailAdd = $_POST['email'];
$passWord = $_POST['password'];
$query =  mysql_query("SELECT * FROM users where USERNAME = '$username' ");
$result = mysql_fetch_array($query);

  if($fullName == "")
  {

?>
    <script>
      if(alert("Full Name is required!"))
      {
            window.location.href = "registeruser.php";
        }
    </script>
<?php
  }

    else
    {
      if ($userName == "")
      {
?>
        <script>
          if(alert("Invalid username!"))
          {
            window.location.href = "registeruser.php";
            }
        </script>
 <?php     
      }

        else
        {
          if($userName == $result['USERNAME'])
          {
?>
            <script>
              if(alert("Username already exists!"))
              {
                    window.location.href = "registeruser.php";
                }
            </script>
<?php
          }

            else
            {
              if ($emailAdd == $result['EMAIL']) 
              {
?>
                <script>
                  if(alert("Email address is required!"))
                  {
                        window.location.href = "registeruser.php";
                    }
                </script>
<?php
              }

                else
                {
                  if ($passWord == "")
                  {
?>
                    <script>
                      if(alert("Username is required!"))
                      {
                            window.location.href = "registeruser.php";
                        }
                    </script>
 <?php     
                  }

                    else
                    {
                      if($_POST['password']==$_POST['confirmpass'])
                      {
                        mysql_query("INSERT INTO users (FULLNAME, USERNAME, EMAIL, PASSWORD) 
                        VALUES ('$fullName', '$userName', '$emailAdd', '$passWord')" );
                        mysql_close();
?>    
                        <script>
                          if(alert("Registered Successfully!"))
                          {
                                window.location.href = "index.php";
                            }
                        </script>
<?php
                      }

                        else
                        {
?>
                          <script>
                           if(alert("Password and Confirm Password do not match"))
                            {
                                  window.location.href = "registeruser.php";
                            }
                          </script>
<?php
                        }
                    }
                }
            }
        }
    }   

?>



您的位置href语法错误。应该是这样的:


<?php
if($fullName == "")
{
  echo '<script>';
  echo 'alert("Full Name is required!")';
  echo '</script>';
}
?>
</body>



if（$fullName==“”）
{
回声'；
回显“警报”（“需要全名！”）；
echo'window.location.href=SITE_URL.“registeruser.php”；
回声'；
}



这里SITE_URL是您的项目根路径，类似于此脚本将在同一页面上执行，但您必须使用如下表单


if($fullName == "")
{
  echo '<script>';
  echo 'alert("Full Name is required!")';
  echo 'window.location.href = SITE_URL."registeruser.php"';
  echo '</script>';
}





您好，您是否尝试将ajax与jquery结合使用

现在，您的脚本是否只返回一个json对象来说明一切是否正常
//reg.php

<?php

session_start();

include_once "connect.php";
if(isset($_POST[submit])){
$fullName = $_POST['fullname'];
$userName = $_POST['username'];
$emailAdd = $_POST['email'];
$passWord = $_POST['password'];
$query =  mysql_query("SELECT * FROM users where USERNAME = '$username' ");
$result = mysql_fetch_array($query);

  if($fullName == "")
  {
              header('Location:registration.php?fname=1');


  }

    else
    {
      if ($userName == "")
      {
                header('Location:registration.php?uname=1');

      }

        else
        {
          if($userName == $result['USERNAME'])
          {

           header('Location:registration.php?uname=2');
          }

            else
            {
              if ($emailAdd == $result['EMAIL']) 
              {
               header('Location:registration.php?mail=1');

              }

                else
                {
                  if ($passWord == "")
                  {

                                header('Location:registration.php?pwrd=1');
                  }

                    else
                    {
                      if($_POST['password']==$_POST['confirmpass'])
                      {
                        mysql_query("INSERT INTO users (FULLNAME, USERNAME, EMAIL, PASSWORD) 
                        VALUES ('$fullName', '$userName', '$emailAdd', '$passWord')" );
                        mysql_close();

                      echo '   <script>
                          alert("Registered Successfully!");
                          window.location.href = "index.php";
                        </script>';

                      }

                        else
                        {

           header('Location:registration.php?pwrd=2');
                        }
                    }
                }
            }
        }
    }   
}
?>


及
//registration.php


session_start();
header('Content-type: application/json');

include_once "connect.php";

// result we return to the user
$response = ['error' => false, 'message' => ''];

$fullName = $_POST['fullname'];
$userName = $_POST['username'];
$emailAdd = $_POST['email'];
$passWord = $_POST['password'];
$query =  mysql_query("SELECT * FROM users where USERNAME = '$username' ");
$result = mysql_fetch_array($query);

if($fullName == "") {
    $response['message'] = 'Full Name is required!';
    $response['error'] = true;
} else {
    if ($userName == "") {
        $response['message'] = 'Invalid username!';
        $response['error'] = true; 
    } else {
        if($userName == $result['USERNAME']) {
            $response['message'] = 'Username already exists!';
            $response['error'] = true;
        } else {
            if ($emailAdd == $result['EMAIL'])  {
                $response['message'] = 'Email address is required!';
                $response['error'] = true;
            } else {
                if ($passWord == "") {
                    $response['message'] = 'Username is required!';
                    $response['error'] = true;
                } else {
                    if($_POST['password']==$_POST['confirmpass']) {
                        mysql_query("INSERT INTO users (FULLNAME, USERNAME, EMAIL, PASSWORD)  VALUES ('$fullName', '$userName', '$emailAdd', '$passWord')" );
                        mysql_close();
                        $response['message'] = 'OK';
                        $response['error'] = false;
                    } else {
                        $response['message'] = 'Password and Confirm Password do not match';
                        $response['error'] = true;
                    }
                }
            }
        }
    }
}

die(json_encode($response));




$（文档）.ready（（）=>{
$（'#myForm'）。关于（'submit'，函数（e）{
e、 预防默认值（）；
$.post（'reg.php'，$（this.serialize（））
.完成（（数据）=>{
如果（数据错误）{
警报（数据信息）；
}否则{
警报（“注册成功”）；
}
}).失败（（）=>{
警报（“连接错误！！！”）；
});
});
});

尝试将一个
/
放在
registereduser.php
之前，或将确切路径与域名放在一起。将完整路径添加到
echo'window.location.href=“registeruser.php”否。这不是工作。可能的复制，也许你应该考虑在Ajax请求中这样做。顺便说一句，请千万不要做类似于
mysql\u查询（“SELECT*FROM users where USERNAME='$USERNAME'）
，因为你打开了SQL注入的大门。我想他说的是发生警报时显示的页面，不是警报后重定向到的页面。请添加更多关于您答案的描述。您是否遗漏了什么
isset（$\u GET['message'
@TarangP我有这个问题，有什么问题吗？我认为正确的语法是isset（$\u GET['message']）啊，你为什么不说我打错了，漏掉了
]
？

<form method=POST action="">
<!--input goes here-->
</form>



<?php

session_start();

include_once "connect.php";
if(isset($_POST[submit])){
$fullName = $_POST['fullname'];
$userName = $_POST['username'];
$emailAdd = $_POST['email'];
$passWord = $_POST['password'];
$query =  mysql_query("SELECT * FROM users where USERNAME = '$username' ");
$result = mysql_fetch_array($query);

  if($fullName == "")
  {


  echo '    <script>
      alert("Full Name is required!");
      window.location.href = "registeruser.php";
    </script>';

  }

    else
    {
      if ($userName == "")
      {

        echo '   <script>
          alert("Invalid username!");
          window.location.href = "registeruser.php";
        </script>';

      }

        else
        {
          if($userName == $result['USERNAME'])
          {

          echo '  <script>
              alert("Username already exists!");
              window.location.href = "registeruser.php";
            </script>';

          }

            else
            {
              if ($emailAdd == $result['EMAIL']) 
              {

                echo '<script>
                  alert("Email address is required!");
                  window.location.href = "registeruser.php";
                </script>';

              }

                else
                {
                  if ($passWord == "")
                  {

                   echo ' <script>
                      alert("Username is required!");
                      window.location.href = "registeruser.php";
                    </script>';

                  }

                    else
                    {
                      if($_POST['password']==$_POST['confirmpass'])
                      {
                        mysql_query("INSERT INTO users (FULLNAME, USERNAME, EMAIL, PASSWORD) 
                        VALUES ('$fullName', '$userName', '$emailAdd', '$passWord')" );
                        mysql_close();

                      echo '   <script>
                          alert("Registered Successfully!");
                          window.location.href = "index.php";
                        </script>';

                      }

                        else
                        {

                         echo '  <script>
                            alert("Password and Confirm Password do not match");
                            window.location.href = "registeruser.php";
                          </script>';

                        }
                    }
                }
            }
        }
    }   
}
?>



<?php
 if(isset($_GET[fname]) && $_GET[fname]==1)
    echo ' <script>
          alert("Full Name is required!");
        </script>';
  if(isset($_GET[uname]) && $_GET[uname]==1 )
      echo '   <script>
          alert("Invalid username!");
        </script>';
  if(isset($_GET[uname]) && $_GET[uname]==2 )
    echo '  <script>
              alert("Username already exists!");
            </script>';
  if(isset($_GET[pwrd]) && $_GET[pwrd]==2 )
  echo '  <script>alert("Password and Confirm Password do not match");
                          </script>';
  if(isset($_GET[pwrd]) && $_GET[pwrd]==1 )
     echo '  <script>alert("Password is invalid");
                          </script>';
    if(isset($_GET[mail]) && $_GET[mail]==1 )
      echo '  <script>alert("invalid mailid");
                          </script>';

?>
<form method=POST action="reg.php">
<!--input goes here-->
</form>



<?php

session_start();

include_once "connect.php";
if(isset($_POST[submit])){
$fullName = $_POST['fullname'];
$userName = $_POST['username'];
$emailAdd = $_POST['email'];
$passWord = $_POST['password'];
$query =  mysql_query("SELECT * FROM users where USERNAME = '$username' ");
$result = mysql_fetch_array($query);

  if($fullName == "")
  {
              header('Location:registration.php?fname=1');


  }

    else
    {
      if ($userName == "")
      {
                header('Location:registration.php?uname=1');

      }

        else
        {
          if($userName == $result['USERNAME'])
          {

           header('Location:registration.php?uname=2');
          }

            else
            {
              if ($emailAdd == $result['EMAIL']) 
              {
               header('Location:registration.php?mail=1');

              }

                else
                {
                  if ($passWord == "")
                  {

                                header('Location:registration.php?pwrd=1');
                  }

                    else
                    {
                      if($_POST['password']==$_POST['confirmpass'])
                      {
                        mysql_query("INSERT INTO users (FULLNAME, USERNAME, EMAIL, PASSWORD) 
                        VALUES ('$fullName', '$userName', '$emailAdd', '$passWord')" );
                        mysql_close();

                      echo '   <script>
                          alert("Registered Successfully!");
                          window.location.href = "index.php";
                        </script>';

                      }

                        else
                        {

           header('Location:registration.php?pwrd=2');
                        }
                    }
                }
            }
        }
    }   
}
?>



session_start();
header('Content-type: application/json');

include_once "connect.php";

// result we return to the user
$response = ['error' => false, 'message' => ''];

$fullName = $_POST['fullname'];
$userName = $_POST['username'];
$emailAdd = $_POST['email'];
$passWord = $_POST['password'];
$query =  mysql_query("SELECT * FROM users where USERNAME = '$username' ");
$result = mysql_fetch_array($query);

if($fullName == "") {
    $response['message'] = 'Full Name is required!';
    $response['error'] = true;
} else {
    if ($userName == "") {
        $response['message'] = 'Invalid username!';
        $response['error'] = true; 
    } else {
        if($userName == $result['USERNAME']) {
            $response['message'] = 'Username already exists!';
            $response['error'] = true;
        } else {
            if ($emailAdd == $result['EMAIL'])  {
                $response['message'] = 'Email address is required!';
                $response['error'] = true;
            } else {
                if ($passWord == "") {
                    $response['message'] = 'Username is required!';
                    $response['error'] = true;
                } else {
                    if($_POST['password']==$_POST['confirmpass']) {
                        mysql_query("INSERT INTO users (FULLNAME, USERNAME, EMAIL, PASSWORD)  VALUES ('$fullName', '$userName', '$emailAdd', '$passWord')" );
                        mysql_close();
                        $response['message'] = 'OK';
                        $response['error'] = false;
                    } else {
                        $response['message'] = 'Password and Confirm Password do not match';
                        $response['error'] = true;
                    }
                }
            }
        }
    }
}

die(json_encode($response));



<form method=POST action="reg.php" id="myForm">
<!--input goes here-->
</form>

<script src="//path to jquery"></script>

<script>

$(document).ready(() => {

    $('#myForm').on('submit', function (e) {
        e.preventDefault();

        $.post('reg.php', $(this).serialize())
            .done((datas) => {


                if(datas.erreur) {
                    alert(datas.message);
                } else {
                    alert('registration succesfully');
                }
            }).fail(() => {
                alert('connect error !!!');
            });
    });

});
</script>