不要为某些输入字段添加规则

Question

So I have input fields and when they are submitted, I check to see if their inputted text appears in an array:

<form method="post">
   <input type="text" name="1">
   <input type="text" name="2">
   <input type="text" name="3">
   <input type="submit" name="submit">
</form>

<?php 

if(isset($_POST['submit'] {

   $array = array('432423', '434', '3', '2', '213');

   $success = true;

   foreach ($_POST as $key=>$value) {
        if (!empty($value) && $key != "submit") {
            if (!in_array($value, $array)) {
                $success = false;
            }
        }
   }


   var_dump($success); 
   // TRUE if all contains, FLASE if any one doesn't contain

}

?>

But if I wanted a certain input field not to have to be checked against the array, how would I do this

Answer 1

Then you probably want to check for another $key != something?

E.g.

if (!empty($value) && $key != "submit" && $key != "2") {
   ...

This would exclude the second input...