如何检查表单中的任何字段在php中是否为空 [英] How to check if any fields in a form are empty in php

问题描述

每当我提交我的表单中的东西，我想检查是否有任何字段是空的。到目前为止，我有什么不工作

  $ firstname = $ _POST ['firstname']; 
 $ lastname = $ _POST ['lastname']; 
 $ username = $ _POST ['username']; 
 $ password = $ _POST ['password']; 
 $ passwordconf = $ _POST ['passwordconf']; 
 $ email = $ _POST ['email']; 
 $ securityq = $ _POST ['securityq']; 
 $ qanswer = $ _POST ['qanswer']; $（$ firstname）|| empty（$ lastname）|| empty（$ username）|| empty（$ password）|| empty（$ passwordconf）|| empty（$ email）
 
 if || empty（$ securityq）|| empty（$ qanswer））
 {
 echo你没有填写必填字段。 
 
 code $ <$ $ p 
 
 
和表格 
 
 
 < form name =registrationformaction =register.php> 
名字：< input type =textname =firstname> 
姓氏：< input type =textname =lastname> 
电子邮件地址：< input type =textname =email> 
用户名：< input type =textname =username> 
密码：< input type =passwordname =password> 
确认密码：< input type =passwordname =passwordconf> 
安全问题：< input type =textname =securityq> 
答案：< input type =textname =qanswer> 
< input type =submitname =submitvalue =Register> 
< / form> 
  
以及heres登录页面（如果有帮助） http://www.myjournal.tk/register.html  
解决方案
您的表单缺少方法... 
 < form name =registrationformaction =register。 phpmethod =post> // here 
  
 anywyas检查发布的数据，您可以使用 isset（） .. 
 
 
确定是否设置了变量并且不为NULL 
 
 
 
 
 
  if（！isset（$ firstname ）|| trim（$ firstname）==''）
 {
 echo你没有填写必填字段。 
} 
  
 
whenever I submit something in my form i want to check if any of the fields are empty.  So far what I have is not working
$firstname = $_POST['firstname'];
$lastname = $_POST['lastname'];
$username = $_POST['username'];
$password = $_POST['password'];
$passwordconf = $_POST['passwordconf'];
$email = $_POST['email'];
$securityq = $_POST['securityq'];
$qanswer = $_POST['qanswer'];

if(empty($firstname) || empty($lastname) || empty($username) || empty($password) || empty($passwordconf) || empty($email) || empty($securityq) || empty($qanswer))
{
    echo "You did not fill out the required fields.";
}
and the form
<form name="registrationform" action="register.php">
    First Name:<input type="text" name="firstname">
    Last Name:<input type="text" name="lastname">
    Email:<input type="text" name="email">
    Username:<input type="text" name="username">
    Password:<input type="password" name="password">
    Confirm Password:<input type="password" name="passwordconf">
    Security Question:<input type="text" name="securityq">
    Answer:<input type="text" name="qanswer">
    <input type="submit" name="submit" value="Register">
</form>
and heres the registation page if it helps http://www.myjournal.tk/register.html
解决方案
your form is missing the method...
<form name="registrationform" action="register.php" method="post"> //here
anywyas to check the posted data u can use isset()..

  
Determine if a variable is set and is not NULL


if(!isset($firstname) || trim($firstname) == '')
{
   echo "You did not fill out the required fields.";
}


                        
这篇关于如何检查表单中的任何字段在php中是否为空的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！