使用嵌套if验证表单和电子邮件 - validate form and email with nested if

validate form and email with nested if

我想用电子邮件验证表单。我不知道我的代码是否好。我不知道该把所有的东西放在一起做点什么，也许用嵌套if。我想这样做：1）如果用户名、密码或地址为空，则为每一个都返回一个它是否有效以及其他无效的回波2）当电子邮件地址拼写错误时，发出一个回复，如果正确，则发出另一个回复。3）如果电子邮件地址为空，则返回一个响应，如果为假，则返回另一个响应4）与用户相同，密码分别为空，两个回声一个为真，另一个为假。请帮忙！

<html>
<head></head>
<body>

<form action ="form_testare1.php" method = "POST">
User:<input type="text" name = "user" />
<br/>
password:<input type = "password" name = "password" />
<br/>
Email:<input type = "text" name = "email" />
<br/>
<input type = "submit" name = "submit" value ="submit"/>
</form>
<?php
$password = $_POST['password'];
$user = $_POST['user'];
$email = $_POST['email'];
if(isset($_POST['user']) && ($_POST['password']) && ($_POST['email']))
{
    echo "user , password and  email are set<br/>";
}
else
{
echo "user:$user password:$password or email:$email not set<br/>";
}
if(strlen($password)>0 && strlen($user)>0 && strlen($email)>0){

        echo "User: $user<br/>";
        echo "Password: $password<br/>";
        echo "Email: $email<br/>";
    }
        else
    {
    echo "user:$user password:$password or email:$email are empty<br/>";
    }

        if(filter_var($email,FILTER_VALIDATE_EMAIL))
                    {
                    echo "emailul is valid";
                    }
                    else
                    {
                        echo "emailul is not valid<br/>";
                    }


?>
</body>
</html>

简而言之，您可以将输入命名为data[name]、data[email]。。。像这样检查

foreach($_POST['data'] as $key=>$value){ 
 if($key == 'email'){ 
  if(!empty($value) && preg_match("/^(.*)@(.*)'.(.*)$/",$value)){ 
   echo 'email is valid'; 
  }else{ 
   echo 'email is invalid'; 
  } 
 }else{ 
  echo !empty($value)?"$key is correct":"$key is incorrect"; 
 } 
}

在您必须更正之前

 if(isset($_POST['user']) && isset($_POST['password']) && isset($_POST['email']))

这样重命名？

<form action ="form_testare1.php" method = "POST">
User:<input type="text" name = data['user'] />
<br/>
password:<input type = "password" name = data['password'] />
<br/>
Email:<input type = "text" name = data['email'] />
<br/>
<input type = "submit" name = "submit" value ="submit"/>
</form>