如果字段为空，则重定向到php页面 [英] redirect to php page if fields are empty

问题描述

我想在没有任何参数的情况下提交表单时重定向到具有表单的页面，我也想返回一条错误消息，我怎样才能从控制器重定向到表单？

 < form action =controllers / Customer.controller.phpmethod =post> 
 
< label for =cellPhoneNo>手机号码< / label> 
< input type =textname =cellPhoneNoclass =textField/> 
 
< label for =telephone>电话号码< / label> 
< input type =textname =telephoneclass =textField/> 
 
< input type =submitname =searchCustomervalue =بحث/> 
< / form> 
  

以下是Customer.controller.php页面

  if（trim（$ _ POST ['cellPhoneNo']）==&& trim（$ _ POST ['telephone']）==）{
 
 //include('Location:index.php'）; //我应该在这里写什么？ 
回显空; 
 
  

解决方案

不知道你的结构框架，你可以使用PHP的头文件

  if（trim（$ _ POST ['cellPhoneNo']）==&& trim（$ _ POST ['telephone']）==）{ 
 
 $ _SESSION ['error'] ='字段不能为空！'; 
 header（'Location：myformlocation.php'）; 
 exit（）; 
} 
  

只要在表单上方：

 <？php if（isset（$ _ SESSION ['error']））：？> 
 
< div class =error><？php echo $ _SESSION ['error'];？>< / div> 
 
<？php 
 unset（$ _ SESSION ['error']）; 
 endif; ？> 
 
 
< form action =controllers / Customer.controller.phpmethod =post>因此，无论何时提交表单，如果字段为空，表单页面将被重新加载，并且由于
 
 
 $ b $ p> 
 
 
现在设置_SESSION错误，它将被显示。您可能想从$ _SESSION ['error']显示中创建一个函数，所以您不会在每个表单中编写所有代码。
 
 
 
 编辑在评论之后： 
 
嗯，我不太了解你的问题，你可以使用$ _GET：
  header（Location：../index.php?page=customerSearch）; 
  
，您可以通过
  $ pageToInclude = $ _GET ['page'];  //正确清理
 
 
 
或使用 
 
 
  $ _ SESSION ['pageToInclude'] ='CustomerSearch'; 
 $ _SESSION ['error'] ='字段不能为空！'; 
 header（'Location：myformlocation.php'）; 
 .... 
  
以及您使用的索引 
 
 
  $ pageToInclude = isset（$ _ SESSION ['pageToInclude']）？ $ _SESSION ['pageToInclude']：'someotherdefaultpage'; 
  
 
I want to redirect to the page which has a form when user submit the form without any parameters, also I want to return an error message, how can I redirect from controller to the form?
<form action="controllers/Customer.controller.php" method="post">

    <label for="cellPhoneNo">cell phone number</label>
    <input type="text" name="cellPhoneNo" class="textField"/>

    <label for="telephone">telephone number</label>
    <input type="text" name="telephone" class="textField"/>

    <input type="submit" name="searchCustomer" value="بحث"/>
</form>
and here's the Customer.controller.php page
  if(trim($_POST['cellPhoneNo']) == "" && trim($_POST['telephone']) ==""){

  //include('Location:index.php'); //what I supposed to write here?
   echo "empty";
}

解决方案
Not knowing the structure of your framework, you can use php's header
if(trim($_POST['cellPhoneNo']) == "" && trim($_POST['telephone']) ==""){

   $_SESSION['error'] = 'Fields cannot be empty!';
   header('Location: myformlocation.php');
   exit(); 
}
And just above your form:
<?php if(isset($_SESSION['error'] )) : ?>

<div class="error"><?php echo $_SESSION['error'];?></div>

<?php 
unset($_SESSION['error']); 
endif; ?>


<form action="controllers/Customer.controller.php" method="post">
So, whenever the form submits, if fields are empty, the form page is reloaded and, since $_SESSION error is now set, it will be displayed. You might want to make a function out of $_SESSION['error'] displaying, so you won't writing all that code in each form.


EDIT after comment:

Uhm, I'm not really sure to understand your question, you can use either $_GET:
header("Location: ../index.php?page=customerSearch"); 
and you retrieve it in index with 
$pageToInclude = $_GET['page'];  //properly sanitized

or use 
$_SESSION['pageToInclude'] = 'CustomerSearch'; 
$_SESSION['error'] = 'Fields cannot be empty!';
header('Location: myformlocation.php');
....
and in index you use 
$pageToInclude = isset($_SESSION['pageToInclude']) ? $_SESSION['pageToInclude'] : 'someotherdefaultpage';


                        
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