除非填写所有字段，否则联系表格不会发送，需要字段是否可选？

Question

This is the code for my contact form, its pretty short, the site uses java and php, if that matters to mention. Anyways, "Email" and "Name" fields need to be optional, but it will not send unless they are filled, what needs to be changed down below? (Im not a good php guy, so example or copying it in your answer will help) thanks!

<?php
error_reporting(0);
$from = '[e-mail]';
$to = '[e-mail]';
if ($_POST['sender_subject'] and $_POST['sender_message'] and $_POST['sender_name'] and $_POST['sender_email']) {
    $message = "Complainers email: " . $_POST['sender_email'] . "
Complainers name: " . $_POST['sender_name'] . "
Complainers message: " . $_POST['sender_message'] . "
";
    $headers .= "From:" . $from;
    mail($to, $_POST['sender_subject'], $message, $headers);
    $data = array('status'=>0);
    echo(json_encode($data));
}else{
    $data = array('status'=>1);
    echo(json_encode($data));
}
return;

Answer 1

You can just remove and $_POST['sender_name'] and $_POST['sender_email']

and do:

if($_POST['sender_subject'] && $_POST['sender_message']){

Or, you can also use:

if(!empty($_POST['sender_subject']) && !empty($_POST['sender_message'])){

!empty() checks if the fields were not empty.

---

Sidenote: && has precedence over AND, just a quick FYI.