如果字段为空，则重定向到php页面

本文介绍了如果字段为空，则重定向到php页面的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 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';