PHP | Get input name through $_POST[]

Question

HTML example:

Answer 1

foreach($_POST as $key => $value)
{
 echo 'Key is: '.$key;
 echo 'Value is: '.$value;
}

Answer 2

You can use a foreach Loop to get all values that are set.

foreach ($_POST AS $k=>$v){
    echo "$k is $v";
}

Your example

echo $_POST['email'].name; //output: email

wouldnt make sense, since you already know the name of the value you are accessing?