即使所有字段未填写，表单也会提交 [英] Form submits even when all fields aren't filled out

问题描述

我是新来的PHP，我不明白为什么这个表单在任何情况下都提交...
所以我的问题是：

如何解决这个问题，以便表单只在用户填写所有字段时提交？

  if（！$ _ POST ['用户名']&&！$ _ POST ['password']&&！$ _ POST ['repassword'] 
&&！$ _ POST ['user_firstname']&&！$ _ POST ['user_lastname']）{
 header（'Location：register.php？msg =您没有完成所有必填字段'）; 
} 
  

我使用了&& 和 || 运算符，但它总是提交，无论填写什么字段。

 < form action =createuser.phpmethod =postname =registration_formid =registration_form> ; 
< label>电子邮件< / label> 
< input name =usernametype =textid =usernamesize =50maxlength =50/>< br /> 
< label>名字< / label> 
< input name =user_firstnametype =textid =user_firstnamesize =50maxlength =50/>< br /> 
< label>姓氏< / label> 
< input name =user_lastnametype =textid =user_lastnamesize =50maxlength =50/>< br /> 
< label>密码< / label> 
< input name =passwordtype =passwordid =passwordsize =50maxlength =100/>< br /> 
< label>重新输入密码< / label> 
< input name =repasswordtype =passwordid =repasswordsize =50maxlength =100/>< br /> 
 
 
< input type =submitvalue =Registername =submit/> 
  

在此先感谢您的帮助，这似乎是一个非常棒的社区！ p>

解决方案

  if（empty（$ _ POST ['username']）
 || empty（$ _ POST ['password']）
 || empty（$ _ POST ['repassword']）
 || empty（$ _ POST ['user_firstname']）
 || empty（ $ _POST ['user_lastname']）
）{
 header（'Location：register.php？msg =您没有完成所有必填字段'）; 
 
 $ / code> 

编辑：正确，如评论所示，验证需要更充实比这个。检查后重定向不是一个好主意，而是尝试将表单发布到自身。如果没有任何错误，那么继续处理表单数据，如果有错误将它们设置在变量/对象/数组中，并将它们显示在表单上/用表单数据重新填充表单。

I'm new to php and I don't quite understand why this form is submitting under all circumstances... So my question is:

How do I fix this so the form only submits when the user fills out all fields?

if (!$_POST['username'] && !$_POST['password'] && !$_POST['repassword'] 
&& !$_POST['user_firstname'] && !$_POST['user_lastname'] ){
header('Location: register.php?msg=You did not complete all of the required fields');
}

I used both && and || operators however it always submits no matter what field you filled out.

<form action="createuser.php" method="post" name="registration_form" id="registration_form">
<label>Email</label>
<input name="username" type="text" id="username" size="50" maxlength="50" /><br />
<label>First Name</label>
<input name="user_firstname" type="text" id="user_firstname" size="50" maxlength="50" /><br />
<label>Last Name</label>
<input name="user_lastname" type="text" id="user_lastname" size="50" maxlength="50" /><br />
<label>Password</label>
<input name="password" type="password" id="password" size="50" maxlength="100" /><br />
<label>Re-type Password</label>
<input name="repassword" type="password" id="repassword" size="50" maxlength="100" /><br />


<input type="submit" value="Register" name="submit" />

Thanks in advance for any help, and this seems like an awesome community to be involved in!

解决方案

if (empty($_POST['username'])
    || empty($_POST['password'])
    || empty($_POST['repassword'])
    || empty($_POST['user_firstname'])
    || empty($_POST['user_lastname'])
    ){
header('Location: register.php?msg=You did not complete all of the required fields');
}

EDIT: True, as the comments suggest, the validation needs to be more substantial than this. redirecting after checking is not a good idea, instead try posting the form to itself. If there aren't any errors then continuing with processing the form data, if there are errors set them in a variable/object/array and display them on the form/repopulate the form with the post data.

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